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You are here: MacNN Forums > Software - Troubleshooting and Discussion > macOS > Big Sur

Big Sur
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Chongo
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Oct 5, 2020, 12:28 PM
 
$&*&$#! Well I just discovered my late 2013 27” iMac did not make the Big Sur cut. How long does Apple support previous OS versions? A new iMac Pro would be nice, but not needed at the moment.
     
OreoCookie
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Nov 10, 2020, 04:11 AM
 
Typically about 7 years, so the cutoff is in line with that. It always sucks, but if I were you, I'd wait until Apple releases an ARM-based iMac. That'll run circles around your current machine.
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reader50
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Nov 10, 2020, 12:13 PM
 
The usual hackers are trying to patch Big Sur to run on earlier Macs. I think they're taking longer than usual, not sure why.

Anyway though, your late-2013 iMac can run Big Sur without modification. If you have a fusion drive setup, that will experience a performance hit, but no other known issues.

You just need to bypass the installer blocks. Easiest way is to install to an external drive on a supported Mac, then boot your iMac from that drive.
     
Chongo  (op)
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Nov 11, 2020, 10:00 AM
 
Originally Posted by OreoCookie View Post
Typically about 7 years, so the cutoff is in line with that. It always sucks, but if I were you, I'd wait until Apple releases an ARM-based iMac. That'll run circles around your current machine.
I’m going to wait until the new iMacs are released. I’ll donate my current Mac to my mother. My last donation, 20” 2007, has been limping along on an external hard drive. The backlighting is starting to die. Hopefully it will last until the new ARM iMac arrives. She will be happy with the jump to a 27” screen.
     
Laminar
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Nov 13, 2020, 02:46 PM
 
How much of a drag is Big Sur going to be on my 2013 MBA? I upgraded from High Sierra to Mojave pretty soon after it came out and it turned the thing into a dog. It's gotten better (or my standards have dropped?) but I haven't bothered going to Catalina. Is Big Sur going to be more of a resource hog or will it be optimized for better performance?

I suppose I should double check for any 32 bit programs I'll lose access to if I ditch Mojave. The thing is mostly for web browsing and running various flavors of Windows in VirtualBox.
     
ghporter
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Nov 14, 2020, 06:59 PM
 
I’m still on Mojave on my MBP; it is still pretty snappy, what with the SSD and everything.

I didn’t go to High Sierra, basically because I didn’t see anything in it I “needed,” and it was almost certain to break some of the apps I still use from them olden days.

So what is the draw for Big Sur? “What’s in it for me?”

Glenn -----OTR/L, MOT, Tx
     
Doc HM
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Nov 25, 2020, 05:51 AM
 
Sorry posted the in wrong thread. Should have been in here as its Big Sur related.

So far I have migrated 2 customer machines using Big Sur. The process was horrendous on both machines in identical ways.
On both Migration assistant spent literally hours indexing read receipts followed by a long pause where it indicated it would take 17 hours to migrate the data. (around 700MB in case 1 and 1.2TB in case 2 - both using external Ssd's over USB 3 to an internal SSD). Both machines revised this to 47 minutes (why the same figure?) after an hour or so and then hung there for about a day while the files copied count ticked up. Both migration paused every time the iMac screen went to sleep and both finished with the proud boast "Your files have been successfully migrated" before going on to make both the now migrated machine hang on boot.

Nice!
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Brien
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Nov 25, 2020, 01:20 PM
 
Originally Posted by ghporter View Post
I’m still on Mojave on my MBP; it is still pretty snappy, what with the SSD and everything.

I didn’t go to High Sierra, basically because I didn’t see anything in it I “needed,” and it was almost certain to break some of the apps I still use from them olden days.

So what is the draw for Big Sur? “What’s in it for me?”
It looks like a iPad
     
ghporter
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Nov 26, 2020, 12:32 PM
 
Originally Posted by Brien View Post
It looks like a iPad
I have an iPad. I want a computer that “feels” more full-featured than an iPad. And the new OS obviously won’t turn my MBP into a touch screen machine, nor magically give it Touch ID either...

So... I still don’t see a need to move away from Mojave on my MBP.

Now, if/when I buy a new Mac, Big Sur is what’s expected, and is what the new machine will be built for. But for what I have (all Intel silicon), I’m holding pat.

{insert “get off my lawn” meme here if appropriate}

Glenn -----OTR/L, MOT, Tx
     
   
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