If iMovie unexpectedly quits, install the latest software updates
http://www.apple.com/support/downloads/imoviehd501update.html
and remove third-party iMovie plug-ins and QuickTime codecs that could potentially cause this symptom.
Make sure you are using the latest version of iMovie. It is available through Software Updates preferences or the iMovie website (
http://www.apple.com/imovie/).
Make sure you have installed the latest Mac OS update. It is available through Software Updates preferences or from the Mac OS X website (http//www.apple.com/macosx/). Note: If you are not using Mac OS X 10.2
or later, update to Mac OS X 10.1.5 at a minimum.
Make sure you have installed the latest QuickTime Update. It is available through Software Updates preferences or from the QuickTime website (
http://www.apple.com/quicktime/).
Incorrect permission settings could cause this symptom. See technical document 106712 "Mac OS X: Troubleshooting Permissions Issues" for information on checking permission settings.
Third-party iMovie plug-ins or QuickTime codecs could also cause this symptom. Disable them and test to see if the symptom is solved by following these steps:
To remove third-party iMovie Plug-ins:
1. Quit iMovie.
2. Open ~/Library/iMovie and see if any files are installed, if so, drag these items to the Desktop. Note: The tilde character "~" represents your home folder.
3. Open iMovie and see if the symptom still occurs.
The Toast Video CD Export plug-in is installed in the iMovie package. To see if this is installed, follow these steps:
1. Locate the iMovie 3 application icon in the Finder. It should be in the Applications folder.
2. Click the application icon to select it.
3. Choose File > Get Info.
4. In the Get Info window that appears, select the Plug-ins pane as indicated: For Mac OS 10.1 through 10.1.5, choose Plug-ins from the pop-up menu. For Mac OS 10.2 or later, click the disclosure triangle next to Plug-ins.
5. Scroll through the list of plug-ins and deselect the Toast Video CD Export option if it is present.