iMovie Hangs at startup
When I open iMovie it starts to display but then gets in perpetual hang with "Loading... Backing up iMovie library..."
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Hi,
Try opening iMovie while holding down the Option and Command keys, and selecting to delete preferences in the box that appears. Other trouble shooting procedures are: Open iMovie in a new User Account (Guest account on your Mac); Open iMovie in a new library (hold down the Option key while opening and select New in the library selection box that appears). If still problems, reinstall iMovie.
An interesting temporary solution that I saw to a similar problem is to open the Applications Folder and control-click on the iMovie icon. Then click on Show Package Contents>Contents>MacOS>iMovie (to launch).
Also, take a look at this thread to see if there is anything in there that helps you:
-- Rich