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Big Sur on iMac (27-inch, Late 2013) with new solid state hard drive

I inherited a iMac 27-inch, Late 2013 and paid for maxed out memory and an ew interlard drive. THEN, I found out Big Sur didn't work on this machine, annoying. Any thongs on how I could get Big Sur on my machine? Has anybody else replaced the internal ve on their older Mac and installed Big Sur?

Posted on Aug 13, 2021 11:45 PM

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Question marked as Apple recommended

Welcome to the Apple Support Communities.


There is no way macOS Big Sur can run on that Mac. It is not compatible.


The 2013 iMac can only support up-to macOS Catalina.


Cheers,


Jack

Posted on Aug 13, 2021 11:55 PM

2 replies

Aug 14, 2021 4:44 AM in response to danielfrompotts point

As previous posting mentioned - Does Not Qualify for Big Sur as per Apple.


The Age of this computer will Govern what newer version of macOS it will Qualify to install. Use About this Mac from the Apple Icon on Desktop - the required Information will be there.


With the above information in-hand - follow this How to get old versions of macOS and verify what version this computer Qualifies to install. Make sure to use Only Safari to commence the download as Others may not work


Make a Time Machine Backup Before attempting. Notation - Mojave is the Last version to support 32 bit applications / extensions and Drivers. Catalina Only support 64 bit and there is no workaround.


Are there any AntiVirus, Disk Cleaner, Optimizers, Un-installers, etc installed which should be removed as per Developers Instructions. They are useless, unneeded, cause havoc and interfere with the normal operation of the OS and may even Corrupt the OS requiring a Reinstallation

Big Sur on iMac (27-inch, Late 2013) with new solid state hard drive

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