App that runs fine under Xcode 15 does not work on Xcode 16.

When I upgraded to Sequoia 15.1, an app that worked fine under OS 14 stopped working. Out of 4 views on the main screen, only 1 is visible. Yet, if I click where another view should be, I get the expected action so the views are there, just not visible. Only I can't see where I am clicking!

I had to upgrade to Xcode 16 to recompile the app and run it in Debug mode. When I do, I get the following:

NSBundle file:///System/Library/PrivateFrameworks/MetalTools.framework/ principal class is nil because all fallbacks have failed.

Can't find or decode disabled use cases.

applicationSupportsSecureRestorableState

FWIW - the only view that actually shows up is the last subview added to the main view.

App that runs fine under Xcode 15 does not work on Xcode 16.
 
 
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