I'm facing the exact same problem with the application I'm working on. Have tried clean up the build folder also check the permission settings for then DerivedData folder but no result. Build succeeds but get the below error Details: The file “myapp” couldn’t be opened because you don’t have permission to view it. Domain: NSCocoaErrorDomain Code: 257 Failure Reason: You don’t have permission. Recovery Suggestion: To view or change permissions, select the item in the Finder and choose File > Get Info. User Info: {     NSFilePath = "/Users/sysuser/Library/Developer/Xcode/DerivedData/myapp-aylojruwzhsbrrbwomkiwefxqlxv/Build/Products/Debug-iphonesimulator/myapp.app"; } - The operation couldn’t be completed. Permission denied Domain: NSPOSIXErrorDomain Code: 13 Failure Reason: Permission denied - System Information macOS Version 10.15.7 (Build 19H114) Xcode 12.4 (17801) (Build 12D4e) Please if someone can help resolve this issue?