You don't say from which version of OS X he upgraded, but is his current iMovie the latest version?
I suspect that the problem lies in his user account, since iMovie is not incompatible with Yosemite; I just opened my version.
How about logging into another user account (or create one) and see if they can be retrieved from iMovie in this test account.
On a Mac since 1984. Currently: 24" M1 iMac, M2 Pro Mac mini with 27" BenQ monitor, M2 Macbook Air, MacOS 14.x; iPhones, iPods (yes, still) and iPads.
|