Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have opened the following preference files:

None of them mention the volume being used for time machine backups. Any ideas?

share|improve this question
up vote 6 down vote accepted

Time Machine's main preferences can be found at /Library/Preferences/ (which you listed - but the name is stored there)

The Backup hard drive is actually stored as an data blob(1) under the key BackupAlias. Property List Editor and most text editors (eg. TextMate, SubEthaEdit, BBEdit, etc.) won't show the information after converting the preference list from binary to xml using plutil. However you can use PlistBuddy (available in /usr/libexec/ which is not in the default path) to give you the name of the drive (with a bunch of repeated information):

/usr/libexec/PlistBuddy -c 'Print :BackupAlias' /Library/Preferences/

1 - This is the base64 decoded form of a _CFULRAlias to be exact.

share|improve this answer
Thanks. I am able to run this command successfully. Do yo uknow how I would change the volume? – Corey Floyd Aug 11 '09 at 9:00
Without resorting to using the Time Machine Control Panel? Not really. I don't know how to properly put the data into the .plist though from what I understand it should be similar to what is done for adding items to the Dock from the command line. – Chealion Aug 11 '09 at 15:28

Ho 5y old topic ;) however you can simply delete /Library/Preferences/ file and add your TM drive back again in TM settings panel. Works for me.

share|improve this answer
You dredged up a 5 year old topic to post this crap? How rude. – HopelessN00b Oct 16 '14 at 19:08

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .