OS X Mountain Lion: If Time Machine doesn’t back up certain files
This article has been archived and is no longer updated by Apple.
If Time Machine doesn’t back up one or more files, you may have excluded them from backups in Time Machine preferences.
- Choose Apple menu > System Preferences, and then click Time Machine.
- Click Options.
- Look in the “Do not back up” list. To remove an item that should not be in the list, select it, click Remove (-), and then click Done.
In rare cases, Time Machine can’t back up software from companies other than Apple due to a setting made by that software. For more information, contact the manufacturer of the software.
Last Modified: Sep 4, 2015