React Native 0.64.0, iOS application build issue.

[TiksGanesh]

Description

After creating successful react native project and tried to run on iPhone simulator but it throws compilation error. Here is logcat from terminal.

warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'Yoga' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'Yoga' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'React-RCTSettings' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'React-RCTSettings' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'RCTTypeSafety' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'RCTTypeSafety' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'React-runtimeexecutor' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'react-native-safe-area-context' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'react-native-safe-area-context' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'glog' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'glog' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'Flipper-RSocket' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'Flipper-RSocket' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'DoubleConversion' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'DoubleConversion' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'React-RCTBlob' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'React-RCTBlob' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'React-jsiexecutor' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'React-jsiexecutor' from project 'Pods')
warning: Capabilities for Signing & Capabilities may not function correctly because its entitlements use a placeholder team ID. To resolve this, select a development team in the test editor. (in target 'test' from project 'test')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'test' from project 'test')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'test' from project 'test')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'Pods-test' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'Pods-test' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'Flipper-PeerTalk' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'Flipper-PeerTalk' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'FlipperKit' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'FlipperKit' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'Flipper-DoubleConversion' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'Flipper-DoubleConversion' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'RNScreens' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'RNScreens' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'React-RCTLinking' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'React-RCTLinking' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'React-RCTText' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'React-RCTText' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'ReactCommon' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'ReactCommon' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'boost-for-react-native' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'React-RCTImage' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'React-RCTImage' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'libevent' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'libevent' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'RNGestureHandler' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'RNGestureHandler' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'React-Core-AccessibilityResources' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'React-cxxreact' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'React-cxxreact' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'React-jsi' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'React-jsi' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'React' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'Flipper-Folly' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'Flipper-Folly' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'React-CoreModules' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'React-CoreModules' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'RCTRequired' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'RNReanimated' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'RNReanimated' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'React-RCTAnimation' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'React-RCTAnimation' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'React-Core' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'React-Core' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'RCT-Folly' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'RCT-Folly' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'React-RCTNetwork' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'React-RCTNetwork' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'Flipper' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'Flipper' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'CocoaAsyncSocket' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'CocoaAsyncSocket' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'FBLazyVector' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'React-RCTActionSheet' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'Flipper-Glog' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'Flipper-Glog' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'React-RCTVibration' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'React-RCTVibration' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'React-callinvoker' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'React-jsinspector' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'React-jsinspector' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'React-perflogger' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'React-perflogger' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'OpenSSL-Universal' from project 'Pods')
warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'FBReactNativeSpec' from project 'Pods')
warning: None of the architectures in ARCHS (i386, x86_64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (i386, x86_64) which is not in EXCLUDED_ARCHS (x86_64). (in target 'FBReactNativeSpec' from project 'Pods')

** BUILD FAILED **

The following build commands failed:
PhaseScriptExecution [CP]\ Copy\ XCFrameworks /Users/dhananjaytikone/Library/Developer/Xcode/DerivedData/test-ebmczwjmnbcljhapdtbnzhbwsfuv/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/OpenSSL-Universal.build/Script-239320555926E0CD72D979B69B4A8ECC.sh

React Native version:

System:
OS: macOS 11.0.1
CPU: (4) x64 Intel(R) Core(TM) i5-4278U CPU @ 2.60GHz
Memory: 77.53 MB / 8.00 GB
Shell: 3.2.57 - /bin/bash
Binaries:
Node: 13.12.0 - /usr/local/bin/node
Yarn: Not Found
npm: 7.9.0 - /usr/local/bin/npm
Watchman: 4.9.0 - /usr/local/bin/watchman
Managers:
CocoaPods: 1.10.1 - /usr/local/bin/pod
SDKs:
iOS SDK:
Platforms: iOS 13.2, DriverKit 19.0, macOS 10.15, tvOS 13.2, watchOS 6.1
Android SDK:
API Levels: 23, 26, 27, 28, 29
Build Tools: 28.0.3, 29.0.2, 29.0.3
System Images: android-27 | Google APIs Intel x86 Atom, android-27 | Google Play Intel x86 Atom, android-29 | Google Play Intel x86 Atom
Android NDK: Not Found
IDEs:
Android Studio: 4.0 AI-193.6911.18.40.6626763
Xcode: 11.2.1/11B500 - /usr/bin/xcodebuild
Languages:
Java: 1.8.0_242-release - /usr/bin/javac
npmPackages:
@react-native-community/cli: Not Found
react: 17.0.1 => 17.0.1
react-native: 0.64.0 => 0.64.0
react-native-macos: Not Found
npmGlobalPackages:
react-native: Not Found

Steps To Reproduce

build application and try to run on iPhone Simulator

1. fired command in Terminal, npx react-native init iPhoneTest
2. after project created successfully, cd iPhoneTest/ios
3. fire command in Terminal, pod install
4. navigate to parent directory, cd..
5. run project, React-native run-ios

Expected Results

It should build application and run on iPhone Simulator or it should throw error for deployment issue because of signing certificate.

[Asinox]

Maybe https://stackoverflow.com/questions/50768723/what-does-warning-mapping-architecture-arm64-to-x86-64-mean

[jonrigerths2]

I'm having the exact same issue. I noticed you're on XCode 11, so am I. I have a hunch that this is the reason, especially because XCode gives a version error when attempting to open the xcode project.

Are you able to update to XCode 12 by chance and try again? I'm stuck on Mojave at the moment (long story) so can't update yet :)

[rossedwardsus]

Same problem. No xcode involved. Created a new project, ran npx react-native start in one terminal and npx react-native run-ios in another, and this same error was thrown.

Any fixes for this?

[TiksGanesh]

I'm having the exact same issue. I noticed you're on XCode 11, so am I. I have a hunch that this is the reason, especially because XCode gives a version error when attempting to open the xcode project.

Are you able to update to XCode 12 by chance and try again? I'm stuck on Mojave at the moment (long story) so can't update yet :)

After few checks, I felt same that due to older version of XCode, I am running into this issue. I upgraded XCode to latest and tried once again but no success.

[rossedwardsus]

What about using a previous version of react native?

[TiksGanesh]

What about using a previous version of react native?

Already on older version 0.62.2

[rossedwardsus]

Are you getting the same error or a different one. There apparently is a bug in older versions of react native but there is a fix for it.

[rossedwardsus]

I am running 0..63.4. But you have to change a line in Podfile or else it crashes.

[jonrigerths2]

After days of fighting with this, I finally have v64 running! Hopefully this helps someone...

I do think XCode 12 is required to run this project (even if you are not using the XCode app, I believe iOS still builds via the XCode dev tools). This was obvious when attempting to open the .xcworkspace/.xcodeproj files and getting an error that the version was not compatible. The RN CLI environment setup says XCode 10 but maybe that needs to be updated.

So this is what I did:

1. You need to be on Catalina or higher to get XCode 12. I can't go to Big Sur yet due to company policy, so first step was updating to Catalina
2. After updating to Catalina, install XCode 12.4 (I believe this is the latest you can get with Catalina): https://developer.apple.com/download/more/?=xcode
3. After it finishes (this took 6-8 hours for me), open it up, go to Preferences > Locations, make sure XCode 12.4 is selected for Command Line Tools (Note: I installed the command line tools before the full XCode package, I'm not sure if that is necessary or not. If 12.4 doesn't show up then you may have to download separately and select it here - I'm not much of an XCode user)
4. I installed Node 14 (using nvm), just in case, I'm not sure what version is actually required
5. Updated cocoapods (brew install cocoapods). This gave me some simlink errors, I deleted the old directories that it recommended removing and ran brew link cocoapods
6. At this point, I could finally run the project via the XCode app, but not through terminal, but this ended up being an nvm issue. I kept getting an nvm is not compatible with the "npm_config_prefix" environment variable error. I ran nvm unalias default, then installed the latest nvm, then ran nvm alias default 14. This appears to have fixed the problem

Good luck to anyone else having these issues 😄

[Chi-AnTai]

After days of fighting with this, I finally have v64 running! Hopefully this helps someone...

I do think XCode 12 is required to run this project (even if you are not using the XCode app, I believe iOS still builds via the XCode dev tools). This was obvious when attempting to open the .xcworkspace/.xcodeproj files and getting an error that the version was not compatible. The RN CLI environment setup says XCode 10 but maybe that needs to be updated.

So this is what I did:

1. You need to be on Catalina or higher to get XCode 12. I can't go to Big Sur yet due to company policy, so first step was updating to Catalina
2. After updating to Catalina, install XCode 12.4 (I believe this is the latest you can get with Catalina): https://developer.apple.com/download/more/?=xcode
3. After it finishes (this took 6-8 hours for me), open it up, go to Preferences > Locations, make sure XCode 12.4 is selected for Command Line Tools (Note: I installed the command line tools before the full XCode package, I'm not sure if that is necessary or not. If 12.4 doesn't show up then you may have to download separately and select it here - I'm not much of an XCode user)
4. I installed Node 14 (using nvm), just in case, I'm not sure what version is actually required
5. Updated cocoapods (brew install cocoapods). This gave me some simlink errors, I deleted the old directories that it recommended removing and ran brew link cocoapods
6. At this point, I could finally run the project via the XCode app, but not through terminal, but this ended up being an nvm issue. I kept getting an nvm is not compatible with the "npm_config_prefix" environment variable error. I ran nvm unalias default, then installed the latest nvm, then ran nvm alias default 14. This appears to have fixed the problem

Good luck to anyone else having these issues 😄

Thank! Since I had both Xcode 11 and 12, this command line select really saved me.

[TiksGanesh]

After days of fighting with this, I finally have v64 running! Hopefully this helps someone...

I do think XCode 12 is required to run this project (even if you are not using the XCode app, I believe iOS still builds via the XCode dev tools). This was obvious when attempting to open the .xcworkspace/.xcodeproj files and getting an error that the version was not compatible. The RN CLI environment setup says XCode 10 but maybe that needs to be updated.

So this is what I did:

1. You need to be on Catalina or higher to get XCode 12. I can't go to Big Sur yet due to company policy, so first step was updating to Catalina
2. After updating to Catalina, install XCode 12.4 (I believe this is the latest you can get with Catalina): https://developer.apple.com/download/more/?=xcode
3. After it finishes (this took 6-8 hours for me), open it up, go to Preferences > Locations, make sure XCode 12.4 is selected for Command Line Tools (Note: I installed the command line tools before the full XCode package, I'm not sure if that is necessary or not. If 12.4 doesn't show up then you may have to download separately and select it here - I'm not much of an XCode user)
4. I installed Node 14 (using nvm), just in case, I'm not sure what version is actually required
5. Updated cocoapods (brew install cocoapods). This gave me some simlink errors, I deleted the old directories that it recommended removing and ran brew link cocoapods
6. At this point, I could finally run the project via the XCode app, but not through terminal, but this ended up being an nvm issue. I kept getting an nvm is not compatible with the "npm_config_prefix" environment variable error. I ran nvm unalias default, then installed the latest nvm, then ran nvm alias default 14. This appears to have fixed the problem

Good luck to anyone else having these issues 😄

This resolved my issue, Thanks

[Itsindigo]

If you've followed @jonrigerths2's steps and you're still running into the same issue, you can also delete the contents of node_modules/react-native/scripts/find-node.sh (I did this in addition to @jonrigerths2's steps), this will however stop working each time you reinstall your dependencies.