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I have QuickTime 10.5 running on a Mac Mini with Catalina. When I try to open it it immediately crashes, triggering a crash report. The crash report mentions EXC_BAD_ACCESS (SIGSEGV) and a million other things, none of which I understand. Everything else seems to be working normally. The Activity Monitor doesn't register any opening of QuickTime before it crashes.
Mac mini, macOS 10.15
A reinstall of macOS will probably fix this, but it's a bit overkill I think.
You might find deleting ~/Library/Preferences/QuickTime Preferences will help so try that first.
(That's QuickTime Preferences inside Preferences inside Library inside your Home directory.)
A reinstall of macOS will probably fix this, but it's a bit overkill I think.
You might find deleting ~/Library/Preferences/QuickTime Preferences will help so try that first.
(That's QuickTime Preferences inside Preferences inside Library inside your Home directory.)
Thanks for your help. The file deletion didn't work, I'm afraid.
Ok. Boot into recovery mode (hold down Command-R on startup) then reinstall macOS.
This won’t remove your data.
So I reinstalled as you suggested - thanks again for that - but I'm afraid Quicktime still doesn't work. It crashes in exactly the same way as before.
Quicktime won't open in Catalina
