QuickTime Player unexpectedly quits when saving Motion project

You can open a Motion project file in QuickTime Player by pressing Option-Command and dragging the Motion file to the QuickTime Player icon in the Dock or in the Applications folder.¹

While you can play the project in QuickTime Player, if you choose Save as from the File menu to create a new QuickTime movie file, QuickTime Player may unexpectedly quit. If you are successful with saving the file, the resulting QuickTime movie file may also cause other applications to unexpectedly quit when you attempt to open it or import it.

To avoid this, do not save Motion projects opened in QuickTime Player. If you wish to save a Motion project as a QuickTime Movie, open the project in Motion and choose either File > Export or File > Export using Compressor.

1. In some configurations Motion project files cannot be opened in QuickTime. Click here for more information.