Here is my issue in short :
"iMovie can’t be installed on “Untitled” because macOS version 11.5.1 or later is required."
My system has the latest available update for its version, macOS Catalina version 10.15.7 ?? what else i can do ??
Hmmmm. I didn't think that Catalina could run on a 2012 machine.
In any event, try this procedure to see if you can obtain the highest iMovie version that your OS will run.
To update/redownload iMovie 10, drag your iMovie 10 app from the Applications folder into the trash, but do not empty the trash. (You can skip that step if you had iMovie 10 on your computer before, but deleted it.) Sign in to the app store and open your purchases folder by clicking on your name at the bottom of the app store side bar. You will see your purchases displayed, including iMovie 10. Redownload/update iMovie from there. If not successful, drag your present iMovie app out of the trash (if you moved it there) and return it to the Applications folder.
-- Rich
Hmmmm. I didn't think that Catalina could run on a 2012 machine.
In any event, try this procedure to see if you can obtain the highest iMovie version that your OS will run.
To update/redownload iMovie 10, drag your iMovie 10 app from the Applications folder into the trash, but do not empty the trash. (You can skip that step if you had iMovie 10 on your computer before, but deleted it.) Sign in to the app store and open your purchases folder by clicking on your name at the bottom of the app store side bar. You will see your purchases displayed, including iMovie 10. Redownload/update iMovie from there. If not successful, drag your present iMovie app out of the trash (if you moved it there) and return it to the Applications folder.
-- Rich
Can't install iMovie on my Mac (mid 2012)??
