Fixing Xcode on Monterey under OpenCore Legacy Patcher

If you’re using OCLP (OpenCore Legacy Patcher) on an old Mac in order to upgrade beyond the officially-supported macOS version to macOS Monterey instead, Xcode 13.2.1 will crash on launch with the error “The application “Xcode” can’t be opened, 6″. The crash report gives this cause:

Application Specific Information:
dlopen(@rpath/libIDEApplicationLoader.dylib, 1): image not found
abort() called

If you run Xcode from the Terminal (like “/Applications/Xcode.app/Contents/MacOS/Xcode”) you get a more detailed error log:

dyld: warning: @executable_path/ ignored because of amfi policy (Codesign main executable with Library Validation to allow @ paths)
dyld: warning: @executable_path/ ignored because of amfi policy (Codesign main executable with Library Validation to allow @ paths)
dyld: warning: @executable_path/ ignored because of amfi policy (Codesign main executable with Library Validation to allow @ paths)
dyld: warning: @executable_path/ ignored because of amfi policy (Codesign main executable with Library Validation to allow @ paths)
dyld: warning, LC_RPATH @executable_path/../Frameworks in /Applications/Xcode.app/Contents/MacOS/Xcode being ignored in restricted program because of @executable_path (Codesign main executable with Library Validation to allow @ paths)
dyld: warning, LC_RPATH @executable_path/../SharedFrameworks in /Applications/Xcode.app/Contents/MacOS/Xcode being ignored in restricted program because of @executable_path (Codesign main executable with Library Validation to allow @ paths)
dyld: warning, LC_RPATH @executable_path/../PlugIns in /Applications/Xcode.app/Contents/MacOS/Xcode being ignored in restricted program because of @executable_path (Codesign main executable with Library Validation to allow @ paths)
dyld: warning, LC_RPATH @executable_path/../Frameworks in /Applications/Xcode.app/Contents/MacOS/Xcode being ignored in restricted program because of @executable_path (Codesign main executable with Library Validation to allow @ paths)
dyld: warning, LC_RPATH @executable_path/../SharedFrameworks in /Applications/Xcode.app/Contents/MacOS/Xcode being ignored in restricted program because of @executable_path (Codesign main executable with Library Validation to allow @ paths)
dyld: warning, LC_RPATH @executable_path/../PlugIns in /Applications/Xcode.app/Contents/MacOS/Xcode being ignored in restricted program because of @executable_path (Codesign main executable with Library Validation to allow @ paths)
Error loading required libraries. If there is an ongoing installation please wait for it to complete. Otherwise reinstall. (dlopen(@rpath/libIDEApplicationLoader.dylib, 1): image not found)
[1] 643 abort /Applications/Xcode.app/Contents/MacOS/Xcode

This is caused by OCLP’s “Disable Library Validation Enforcement” patch and this issue is tracked here.

If your Mac doesn’t require AMFI to be disabled for OCLP to work (i.e. this will only work if it has Metal graphics like my MacBook Pro Retina mid-2012), in the OpenCore-Patcher app you can untick the “Disable Library Validation” option in the Developer settings and reboot to apply the changes:

Afterwards Xcode can launch normally!