topic Re: iMac won't run AC23 in Installation & update

Yosemite iMac won't run AC23

lagodue — Wed, 29 Jan 2020 13:38:48 GMT

All - my 2012 iMac running Yosemite 10.10.5 system software cannot be upgraded to run AC23. Does anyone know if there is a hardware part (CPU maybe) that can be changed out so latest Apple OS can be installed?

Re: iMac won't run AC23

Karl Ottenstein — Wed, 29 Jan 2020 16:27:17 GMT

If it is really a 2012 iMac (vs an older one purchased then), it can be upgraded to Mojave (and should have been a long time ago). Mojave will run AC 23 just fine.

Since you have not updated at all since 10.10 (5 version of the operating system have been released since then)... it may be a fear of updating? Be assured, when you upgrade your MacOS, it has not affect on your data files and settings - only the OS. Still, it is wise to do a complete backup before updating!

https://support.apple.com/en-us/HT210190

Re: Yosemite iMac won't run AC23

Ralph Wessel — Thu, 30 Jan 2020 11:45:45 GMT

Adding to Karl's observations, you should be able to update a 2012 iMac to the very latest OS – refer to this page for a list of compatible hardware: https://support.apple.com/en-gb/HT210222

Re: Yosemite iMac won't run AC23

lagodue — Fri, 31 Jan 2020 22:04:03 GMT

Thx for the replies.
I based my question on Apple's website telling me I could not upgrade the OS.

Since then, I have managed to upgrade step by step - Yosemite/Mojave/Sierra/High Sierra - without any hardware upgrades.

All is well!