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jdish144 Author

Level 1

4 points

unable to upgrade OS

Have OS X Yosemite

Version 10.10.5

unable to upgrade to latest OS (mac OS Big sur). Please advise!

Thanks

iMac 27″, OS X 10.10

Posted on Dec 23, 2020 5:43 PM

Top-ranking reply

Piqûre

Level 3

546 points

Posted on Dec 23, 2020 6:05 PM

First, you must verify that your particular Mac is supported by Big Sur. Since you have Yosemite now, I suspect your Mac was released before 2014-15 so there is a chance it is in fact not supported by the new macOS.

Choose "About This Mac" in the Apple menu to learn which mac model is yours.

How to upgrade to macOS Big Sur

https://support.apple.com/en-ca/HT201475

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unable to upgrade OS

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