MacOS update to Ventura 13.1 iMovie no longer responding.
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iMac 27″
Question marked as
1 - Restart in Safe Mode. This will perform a Disk Repair, clear cache files and only load Apple Software, extensions and fonts. The boot up will be slow and can take some time - Normal.
2 - Safe Mode will also eliminate Third Party Software, extensions and drivers from loading
3 - Does the issue present in this mode ?
4 - Sometimes a Safe Boot followed by a Normal Boot will just put things right.
Still issues
From this link remove iMovies and then redownload it again from the Apple Apps Store