Can't finish Catalina install, restart loop. Help!

I downloaded the Catalina software and restarted my computer to finish installing it. But halfway through the install, I get an error message saying, "macOS could not be installed on your computer, A disk with a mount point is required. : (-69854) Quit the installer to restart your computer and try again."

When I restart it, I get the same error message. I tried selecting a different startup disk, but there is no other option (the box is empty/blank). How do I get out of this loop?!

iMac 27″, macOS 10.12

Posted on Oct 17, 2020 07:32 PM

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Sean_W.

Level 6

8,242 points

Posted on Oct 17, 2020 07:51 PM

Here are some steps that may help.

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Top-ranking reply

Sean_W.

Level 6

8,242 points

Oct 17, 2020 07:51 PM in response to Lindsk26

Here are some steps that may help.

Lindsk26 Author

Level 1

8 points

Oct 17, 2020 08:19 PM in response to Lindsk26

Try restarting your computer in recovery mode. Command + R. Just hold the keys down as soon as you restart or power up your computer. It might take a minute or two, but eventually a different screen will show up that might allow you to install an earlier version of OS. Also make sure you are connected to the internet when you do this. Just click in the very top right corner to get to the wifi if you can't see it.

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Can't finish Catalina install, restart loop. Help!