Time Machine of immutable/incorrect information?

I have a client using 10.11.6 on an iMac with a problem with Time Machine not allowing (at least not not appearing to allow) any changes on the disk used for backup and also showing a date in 2015 on the menu bar which the last backup was performed successfully.  Despite all this the TM backups are up-to-date and occurring normally checked by looking at the TM backup drive that I chose (but which does not appear as the backup selected in parameters of TM drive).

I tried to delete the file plist TM but don't know where to go next... of ideas?

Hello MacAttac,

If I understand you right, you have problems with Time Machine backup on your iMac to clients running 10.11.6. Although it seems to be back up successfully by looking at the drive itself, Time Machine in the menu bar that shows the last backup was actually in 2015, and Time Machine in system preferences shows a different drive than the one that it is backup.  I know the importance of keeping a computer backed up regularly, so I can understand the concern that it would cause if you see incorrect dates for backups of this machines.

Because this isn't the good drive backup, try following the steps outlined in this support article: If you can not back up or restore your Mac using Time Machine if after you follow these steps, you do not come to a resolution, reply back to us whether these two disks that were used Time Machine on this computer are the same brand and model.

Thank you for using communities of Apple Support.

Take care!

Tags: Mac OS & System Software

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