Big Sur support on iMac late 2013

macOS Big Sur compatible Macs

Here’s the full list of macOS Big Sur compatible Macs:

• 2015 and later MacBook
• 2013 and later MacBook Air
• 2013 and later MacBook Pro
• 2014 and later Mac mini
• 2014 and later iMac
• 2017 and later iMac Pro
• 2013 and later Mac Pro

That is a page to identify what iMac you have. It has nothing to do with running Big Sur.

2014 and above is correct.

Mac87Pro wrote:

Thats more in case of GPU technology and supported features ....

Does not hold water. Late 2013 MacBook Pro 13", supported

has simple Intel Iris Graphics. Late 2013 21.5" iMac, unsupported,

Intel Iris Pro graphic in base, discrete GPU otherwise and all

27" 2013 iMac have discrete GPU.

As a matter of fact, the base 27" late 2013 iMac has NVIDIA GeForce GT 755M

which has slightly higher performance than the NVIDIA GeForce GT 750M

in the 15" MacBook Pro.

There is some other logic involved.

BTW, running unsupported systems is dicey at best.

References:

late 2013 27" iMac and 15" MacBook Pro

https://support.apple.com/kb/SP690?viewlocale=en_US&locale=en_US

https://support.apple.com/kb/SP688?viewlocale=en_US&locale=en_US

late 2013 iMac 21.5" and 13" MacBook Pro:

https://support.apple.com/kb/SP687?viewlocale=en_US&locale=en_US

https://support.apple.com/kb/SP691?viewlocale=en_US&locale=en_US

mainuddin1972 wrote:

i need help Big Sur support on iMac late 2013

Sorry, no, your late 2013 iMac will not support Big Sur...ever.

Thats more in case of GPU technology and supported features like higher Vulcan and OpenGL version supported. Even if older iMac is more powerful from like late 2013 models, iMac 2014 with intel HD 5000 have newer technology implemented. So basically only devices with gpu supported technology will support new graphics interface in Big Sur natively. Rest of you with like iMac late 2013 may be able to instal unofficial way with small possible graphics glitches. Just check YT or forums in near future ;) no panic

https://support.apple.com/en-us/HT201634

run down the list

click “learn more” and that will give you the complete list...

Please look what is inside Macbook Air Mid 2013, Pro Late 2013. Intel HD 5000 or Iris 5100 both support newer GPU features, GT 750m doesn’t have those.

Basically you need min. that in case of GPU features to instal Big Sur, Apple is trying to be simple for customers. But if you need information:

DirectX

12 (11_1)

OpenGL

4.3

OpenCL

1.2

Vulkan

1.1.80

Shader Model

5.1

Take care

woodmeister50 wrote:

Based on this, just a guess, but there are probably a significantly larger

number of 2013 MacBook Airs and MacBook Pros in the wild than iMacs

hence letting them "under the wire"?

Perhaps, but there is a more obvious explanation for why the Air and Pro were let in under the wire: both shared a model ID with a 2014 model.

The mid-2013 early-2014 Airs share the Macbook Air 6,1/2 model ID. Similarly the Late 2013 and 2014 MBP share the Macbook Pro 11,1/2/3 model IDs. The Late 2013 iMac was not so lucky.

even today, when Big Sur was finally released, this page https://support.apple.com/en-us/HT201634 still shows "iMac models from 2012 and newer can run the latest version of macOS. For models from before 2012, the latest compatible operating system is noted."

According to that info Big Sur must even run on 2012 Macs.

Apple, please confirm or update this page.

Thanks & Regards,

Martin

Wherever the "line is drawn", there will always be someone left out.

Unfortunately those with 2013 iMacs and earlier are among those

left out.

mac_of_all_trades wrote:

A late 2013 21" with a quad core i5 won't upgrade, but a 2014 mini with a dual core i5, hooked to Joe Anybody's LCD will. Whoever drew that line in the sand really should have measured twice before they cut once.

Please tell us where you matriculated to obtain your computer hardware engineering degree?

Apple shut down my ability to upload Big Sur for my Late 2013 iMac, but forgot not to let Pages and Keynote upgrade to Big Sur...now I'm locked out of my documents! Programs won't open, and sent 100+ reports. Looks like Apple can't engineer planned obsolescence as well as MS? My iMac isn't "Vintage" or "Obsolete"...just worthless.

Do you work in Apple?

do you have any idea of how well Big Sur works on my iMac?

if you wish to make claims then back it up first!

all iMacs late 2012 can run Big Sur! Look at the Apple site for Big Sur... clearly you have not read further than page one!

if you cannot say something constructive, then rather say nothing and avoid embarrassing yourself, do us all the favor!

Apparently, you never read one of the post from two pages ago. 2013 27” not compatible with MacOS Big Sur.