Hi,
I create the file always in the TextEdit.app. I just create any empty Plain Text file and I name it crash (there are 2 underscores at the beginning and 2 at the end!!!). Then open the file by using Get Info, and delete the .txt extension. Now your file is ready.
How to use the file.
- Start Cubase.
- Make the steps to make Cubase freeze (scroll in your case).
- Copy the crash file to the preferences folder (user/Library/Preferences/Cubase 10.5)
Cubase will crash. In the macOS Console utility, select the *.crash file and copy it to Dropbox (or similar) and share the link here.
Do I understand you right, you cannot even do any operation out of Cubase? Then this is complete system hang and thats definitely wired. Then I would recommend to test your hardware (please search, how to do it on Mac, there are built-in tools for it in the system).