Disk0 error on SSD

[Mirriamm]

I tried installing an old os, that appeared to be to old for the SSD I am using. It now only starts to a prohibit symbol. When I try to fix the problem I can not see my disk in the disk utility. I only have disk0 and OS X basesystem. please help me out, this is driving me crazy… thanks in advance!

(2TB X2 SSD MacBook Pro Retina A1398 en A1502 mid 2013 - 2015) and wanted to revert from bigsur to my timemachine backup with 10.11.6

 

[Fishrrman]

You're going to have to completely erase the internal drive, and then start over.

Try this.
Can you boot to INTERNET recovery?
Command-OPTION-R
at boot ??

You'll need your wifi password.
Be patient, the utilities take a while to load.
Can you get booted this way?
Try it and tell us if it works.

 

[goldtiger]

You can follow this support article: https://support.apple.com/en-us/HT210901
There is a link at the bottom of the article to get support from an Apple rep as well (they may have more tools at their disposal for service/repair)

 

[alfogator]

1. Shut down your Mac.
2. Hold down Command-Option/Alt-R and press the Power button. (On some Mac keyboards the Option key will be named Alt).
3. Hold down those keys until you a spinning globe and the message "Starting Internet Recovery. This may take a while".
4. The message will be replaced with a progress bar. Wait for it to fill. Expect it to take a while...
5. Wait for the MacOS Utilities screen to appear.
6. Click Reinstall macOS and follow the installation process.

 

[Mirriamm]

Thanks so much for your answer! The internet recovery gave an error, could not connect. I fixed part of the problem; i swapped for the old drive and installed Big Sur on there, it seemed to have fixed some firmware because I can see the disk again. The only problem is I have a timemachine backup with 10.14 that i need to put on it but when i restore with timemachine in internet recovery it Kees on “preparing”

 

[alfogator]

One thing you might try is to make a fresh install of 10.14 (or Big Sur if it's fine for your purposes) and then use migration assistant to import your user data and applications into your new install.