Photo Booth: "Unable to save photo" message when trying to save a photo

If you've saved more than a couple of thousand photos in Photo Booth, Photo Booth may display an error message that says "Unable to save photo" when you try to save a new one. When you try to click OK to dismiss the message, the dialog won't go away. The only way to close the dialog is to force quit Photo Booth using Activity Monitor.

To do this:

1. In the Finder, choose Utilities from the Go menu to open the folder.
2. Open Activity Monitor.
3. In the Process Name column, select Photo Booth (click it once to highlight it).
4. Click the Quit Process button in the upper-left corner of the window.
5. A dialog opens and asks, "Do you really want to quit 'Photo Booth'?" Click Force Quit to confirm it.

If this happens, you will need to delete or move some of your photos before you can use Photo Booth again, or add more memory (RAM) to your computer.