macOS: Invalid package contents problem

[demiantres]

After submitting an app to the Mac App store I receive this email:

Please correct the following issues and upload a new binary to App Store Connect.

ITMS-91109: Invalid package contents - The package contains one or more files with the com.apple.quarantine extended file attribute, 
such as “my.app.pkg/Payload/MyApp.app/Contents/Frameworks/RevenueCat.framework/Versions/A/_CodeSignature”.
 This attribute isn’t permitted in macOS apps distributed on TestFlight or the App Store.
 Please remove the attribute from all files within your app and upload again. 

I did get this warning with previous submissions too, but recently Apple turned the warning into an issue which leads to the rejection of the binary.

[RCGitBot]

👀 We've just linked this issue to our internal tracker and notified the team. Thank you for reporting, we're checking this out!

[demiantres]

My bad: macOS assigns the quarantine flag when downloading the framework. The problem can be fixed by removing the flag: xattr -rc path/to/RevenueCat.framwork.