4.24 Mac Metal Shader Xcode Black Marks

I am experiencing the exact same issue as in this previous post from a few years ago;

https://answers.unrealengine.com/answers/670798/post.html

I can see that it is a Metal Shader / Xcode issue.
Does anybody know what Xcode version I should be using to remove this problem in 4.24?

Thanks

Solved. Revert from latest Xcode (12) to Xcode 10.1 and make sure said Xcode 10.1 is located in the right directory. Also change Metal shader to 2.0 not 2.1 in project settings