Cannot find time machine backup after upgrade to Mountain Lion

Christopher Sant wrote:

. . .

Once it does finally recognize (after a good while) it simply says "Error, time machine could not complete the backup"

There should be more to that message. See #C2 in Time Machine - Troubleshooting. It will show you how to locate the message(s) that describe the problem, then help you fix it. If that doesn't help, post back with details, including all the messages, your setup, what you've done, and the results.

Hi Christopher,

Same problem here in Holland, yesterday updated 2 mac's. Both can't make a timemachine backup.

I have selected a timemachine, but it won't.

The strange thing is, when want to restore something from timemachine it works?????

To pondini: there are no other massages

Please somebody help.

I have upgraded two Macs. They both had Time Machine issues, could not find the prior backups.

For one I was able to get it to work right by turning TM off and on several times in preferences.

The second I had to give up and start new backups. If you have to do that you can still save the old backups and navagate to something you need to retreive manully on the drive. Not great, but I needed to get TM going again.

Clearly a bug here for Apple to address in the next update.

Hey all,

the only thing I have ever found which seems to work every time for me is to ENTER TIME MACHINE, scroll to the oldest backup, close it back down, and retry backup through Time Machine. I too have struggled with this ridiculous issue for some time; it is maddening. This seems to work however. Good luck.