Mac OS X
Q: Time Machine - There was an error preparing the Time Machine backup disk (couldn’t mount disk)
I have a brand new HD but cannot set up encryption with System Preferences. After ten minutes, I get the following error message:
"There was an error preparing the Time Machine backup disk (name of disk) - Couldn’t mount disk"
Apparently, I have to set up the HD this way:
- If you're using an external drive connected to your Mac, use Disk Utility to make sure that your backup drive is formatted as HFS+ Extended (Journaled) and that the partition type is GUID Partition Table (GPT)
There isn't an option for the HFS+ and so I used; OSX EXTENDED (Journaled). GUID is ok.
Please can someone let me know what I need to do.
Thanks
iMac (24-inch Early 2009), OS X El Capitan (10.11.5), time machine
Posted on Jul 21, 2016 9:51 AM