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.

mickybovars Author

Level 1

17 points

Big Sur OS X

I have a late 2013 iMac but use an external SSD boot and store drive. Trying to update to Big Sur, app store says it can't find it. A security update keeps indicating request to be updated, but on start up it tries to go back to the internal old mac drive instead of the boot up ssd. I can't write code! It wasn't a problem last year when I updated to Catalina.

NVIDIA GeForce GT 750M 1 GB

2.9 GHz Quad-Core Intel Core i5

16 GB 1600 MHz DDR3

Catalina 10.15.7 (19H15)

iMac Line (2012 and Later)

Posted on Dec 21, 2020 7:09 AM

Top-ranking reply

rkaufmann87

Level 10

144,886 points

Posted on Dec 21, 2020 7:12 AM

Big Sur requires a 2014 or later iMac, your 2013 is at the end of the road with Catalina 10.15.7.

View in context

Big Sur OS X

Similar questions