Unfortunately, I had two kernel panic today too

Check this thread. https://developer.apple.com/forums/thread/702631 I have the same issue with others for months. I submit a feedback assistant for this issue with id:  FB10069968. I don't run  sudo sysdiagnose or  xcrun simctl diagnose but MacBook collected logs automatic. I will try to reproduce the issue and run these commands. It seems only intel Mac have the issue.

I tried iPhone simulator and I have the same issue.

Thank you very much for you post. I tried iPhone 8 simulator, which has problem too but never try iPhone 7 simulator. You found a way to try our Apps without a device. :( edited: Unfortunately i had kernel panic running iPhone 7 simulator.

MacBook prin 2008 mid 13.3" (intel)

Is there an another issue with this solution. Changing between two versions of NavigationSplitView, the scroll position is different and the transition isn't smooth.

I have opened the issue at stackoverflow. I 'll report it at feedback assistant tomorrow.