If the new library and project work as expected, you've isolated the cause of your issue to the original library or project. For example, if iMovie quit when adding a transition, try to add a transition to the timeline. Try to recreate the issue you were having.Select the clip in the browser, then press the E key to add the clip to the timeline.Select the "Finish Line.mov" file in the list, then click the Import Selected button. Choose File > Import Media, then click Desktop in the Import window sidebar.Click projects to return to the Projects view.Next, import the QuickTime video file into a new project in the new library: Choose File > Share > File, click Next, name the file "Finish Line", then save the video file to the Desktop.Choose File > New Trailer, click the Action trailer template, then click Create.In iMovie, click Projects to return to the Projects view.Next, create the test project using a built-in trailer template, then export it as a QuickTime video file: Name the test library "Test iMovie Library", then save it to the Movies folder in your home folder.In the Open Library window, click New to create a new library.While you're pressing and holding the Option key, click the iMovie app in the Dock or double-click the iMovie app in the Applications folder.You can create a new library and test project to check if the issue is with your library, project or iMovie app.
If you're using a third-party video interface with your Mac, check with the manufacturer for firmware or other software updates for your device. If you can't find your camera listed or need further assistance, contact the manufacturer of the device for support. Make sure you're using a camera and media format that works with iMovie. Check camera and media format compatibility If an iMovie update is available, click Update to download and install it.
Restart your Mac after reconnecting a device if the device requires it. If iMovie works, reconnect devices one at a time until you can reproduce your issue.Open iMovie and attempt to reproduce your issue.Disconnect all external devices other than your keyboard and your mouse.If you're using an external device with iMovie, such as a camera, reset NVRAM: Restart your MacĬhoose Restart from the Apple menu. Try following these troubleshooting steps in orderĪfter trying each step below, test iMovie again to see if you've fixed your issue. Before you begin, make sure you've backed up your iMovie libraries, your media and the iMovie app.
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