Flutter build iOS got error: Requested but did not find extension point with identifier

OK, very weird but running xcrun multiple times seems to fix this. I had also updated to Xcode 13.3 recently.

xcrun -sdk iphoneos --show-sdk-path

The first time it shows the error. The second time it shows the right answer. I ran it with all three sdks, iphoneos, macosx, watchos and all showed the errors the first time. I also ran it with all five of the options for all three sdks:

xcrun -sdk iphoneos --show-sdk-path
xcrun -sdk iphoneos --show-sdk-version
xcrun -sdk iphoneos --show-sdk-build-version
xcrun -sdk iphoneos --show-sdk-platform-path
xcrun -sdk iphoneos --show-sdk-platform-version

The build error from xcodebuild went away after that, although I’m not certain which of the commands fixed it.

Found solution:

1. Check for updates of Xcode in App Store (it should be updated
   already, but just for confirmation)
2. Launch Xcode; it will ask you to install additional software. After installation finishes the errors will gone.

Fixed this by running.

xcrun -sdk macosx --show-sdk-path 

This outputs your current skd path.

/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.3.sdk

Add this to your .zshrc file.

export SDKROOT=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.3.sdk

Source it

source ~/.zshrc

Now run

 xcrun -sdk macosx --show-sdk-version

To avoid hard coding the version you can add this to your .profile:

export SDKROOT=$(xcrun -sdk macosx --show-sdk-path)

reload profile (source path to your profile) and run

xcrun -sdk macosx --show-sdk-version

to verify