You can make a difference in the Apple Support Community!

When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Unable to back up with Time Machine to internal drive on Mac Pro.

I have an older Mac Pro with four internal drives. I use Time Machine for back up to an external drive, but I would like to back up to my already formatted internal drive. Time Machine does not show that drive as an option. How can I make that disk available?

Mac Pro

Posted on Sep 19, 2021 9:38 PM

Reply
Question marked as Top-ranking reply

Posted on Sep 20, 2021 5:44 PM

kenleym Said:

"Unable to back up with Time Machine to internal drive on Mac Pro.: Thank you for your help! Disk still not showing up in Time Machine, but does show in utilities. I mounted and unmounted 3 times and it is still not seen as an available disk in time machine. I have used that disk for other applications and it has worked. I do have an external that I can use with time machine and I'll continue with that. Thanks again"

-------


You are welcome.


External Drives for TMBs:

Using the external drive is the way to go about backing up your Mac. So, use that, rather than an internal one.

3 replies
Question marked as Top-ranking reply

Sep 20, 2021 5:44 PM in response to kenleym

kenleym Said:

"Unable to back up with Time Machine to internal drive on Mac Pro.: Thank you for your help! Disk still not showing up in Time Machine, but does show in utilities. I mounted and unmounted 3 times and it is still not seen as an available disk in time machine. I have used that disk for other applications and it has worked. I do have an external that I can use with time machine and I'll continue with that. Thanks again"

-------


You are welcome.


External Drives for TMBs:

Using the external drive is the way to go about backing up your Mac. So, use that, rather than an internal one.

Sep 19, 2021 9:50 PM in response to kenleym

kenleym Said:

"Unable to back up with Time Machine to internal drive on Mac Pro.: I have an older Mac Pro with four internal drives. I use Time Machine for back up to an external drive, but I would like to back up to my already formatted internal drive. Time Machine does not show that drive as an option. How can I make that disk available?"

-------


Mount the Drive:

Boot into Recovery Mode (Hold Down: [Command + R] upon boot). Then, using Disk Utility, see if the Hard Drive is seem. If it is, then see if you need to click the “Mount’ button for it. Try rebooting once more. If of no success, then click unmount button, and then the mount button. Try rebooting once more.

Sep 20, 2021 11:39 AM in response to TheLittles

Thank you for your help! Disk still not showing up in Time Machine, but does show in utilities. I mounted and unmounted 3 times and it is still not seen as an available disk in time machine. I have used that disk for other applications and it has worked. I do have an external that I can use with time machine and I'll continue with that. Thanks again

Unable to back up with Time Machine to internal drive on Mac Pro.

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.