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ericsokoine

macrumors newbie
Original poster
Sep 9, 2021
3
0
I have a 13 inch macbook pro 2015 model. The internal ssd died but thanks to the internet recovery mode, i managed to install El Captain 10.11.6 on an external ssd drive.

I'm trying to upgrade to Big Sur, but the option to choose my external ssd during installation is greyed out

Screen Shot 2021-09-09 at 4.45.57 PM.png


Same error if i try to install High Sierra. This is what shows after running diskutil list

Screen Shot 2021-09-09 at 5.14.04 PM.png
 
Last edited:
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