iMovie update 10.0.8 hung in App Store, won't finish
My Mac Book Pro (early 2011; fully updated OS 10.3.3) App Store Application was showing "5" on the Dock icon. Opened it and I had 5 updates pending, including an update of iMovie to 10.0.8. I have 10.0.7 installed from an earlier update but had not yet opened it since update (rarely use iMovie).
I clicked "Update All" and closed the updater to let it run.
Coming back to my computer, I had a message to the effect the "iMovie Update failed to complete. To complete, return to App Store Updater." Reopening the App Store, I see that 4 of the updates had completed successfully but iMovie was still showing as needing an update. The icon on the Dock however is now showing "3" (rather than "1"), although the icon on the top bar of the the App Store is showing "1" on the updates icon.
In any event, when I now click on Update iMovie, I just get a spinning pinwheel on the top bar of the App Store and nothing happens. I've waited up to 10 minutes and the pinwheel is still spinning. No other activity is apparent.
When I open iMovie, "about" shows 10.0.7, so indeed the update has NOT installed.
Not sure whether this should be posted under iMovie or OS X App Store updater since I'm not sure where the problem lies. Any suggestions??
MacBook Pro, OS X Yosemite (10.10.3)