This regression is present in 13.0 beta 3 (13A5192j) as well.

For those keys, you probably need to set wantsPriorityOverSystemBehavior to YES.

Same crash here. 11.5.1 on an M1 Mac. Xcode b3, b4, and b5.

Seeing this too, even on WWDC sample code. Running on macOS 11.5.1 on an M1 mac.

Workaround: Run the Simulator on an Intel Mac.

The b7 release notes give another workaround: In Xcode select Product > Scheme > Edit Scheme…, then deselect Run > Options > Queue Debugging > “Enable backtrace recording.” Works for me. -Steve

My radar is currently open with less than 10 similar reports. If you haven't done so, could you file a dupe? There is also a Twitter discussion of this in case it helps. In my app, I work around the missing functionality with a one-off vc that creates a menu-like table view.

Multi-page layout not supported in TextKit2. See the discussion here: https://developer.apple.com/forums/thread/682251 At WWDC, a frameworks engineer indicated they were looking into it, but there has been no update and the requested Feedback (FB9285387) is still open (Nov 4th) with no recent similar reports. Please file a dupe of FB9285387 if this is important to you. -Steve

Seeing the same behavior. Not sure what's going on, but I was able to work around it by making the reuse identifier the same as the nib name. E.g.: class ListItem: NSCollectionViewItem {     static let reuseIdentifier = NSUserInterfaceItemIdentifier("ListItem") // was "list-item-reuse-identifier" ... I suspect I'm now picking up some fallback behavior. -Steve