macOS 11 Big Sur on Unsupported Macs Thread

[TA 455SD]

I also have 2012 Mac mini. Do you have problems with top bar taking something like 20s to load? Also the screensaver are lagging hard. Something like 2-3 fps. Do you have any problems like these? Maybe I should do a clean install?

nope no problems at all , no stutter , simply running smooth as butter 🙂

 

[A4orce84]

I also have 2012 Mac mini. Do you have problems with top bar taking something like 20s to load? Also the screensaver are lagging hard. Something like 2-3 fps. Do you have any problems like these? Maybe I should do a clean install?

I do not have these issues.

 

[AveryTheMacGuy]

Hello! so I have an update on the Mac mini (Mid 2010) and the MacBook (Late 2008). this came by surprise, but @jackluke 's Big Sur Fixes seemed to work to install macOS Big Sur 11.0.1 Public Release on both computers. There may be no graphics acceleration still, but it is rather bearable. I used JackLukes Legacy USB BaseSystem Fix on a USB with the public release version of Big Sur that has been downloaded from GibMacOS, and was able to complete Stage 1 and 2. I then booted the USB and was able to get to the install screen. Used Hax3 in the install recovery to patch the installer, and installed Big Sur. when Big Sur Rebooted, I completed the Preboot and booted back into the USB. I then installed OpenCore (on both the Mini and the MacBook) and completed the Stage3 fixes, FrameBuffer, USB, and more, and was able to get everything working as intended. As of now, the Mini is running macOS Big Sur dualbooted with Catalina, and it is the same with the MacBook. This enlightens hope that the Mac mini Mid 2010 (a1347) and the MacBook Late 2008 (a1278) are able to run Big Sur without the use of an external/newer Mac. This also should shed more hope that more devices are able to run Big Sur. time for me to find ways to get graphics acceleration, though..........

 

[Ausdauersportler]

Did anyone get it to boot a USB key or drive on a IMAC 11,2?
I know it isn't supported but was at least hoping to install it even if it lagged to mess around with.

No, it is not supported, but possible... 🙂

But without a Metal GPU it will be as bad as Catalina and/or Mojave on Radeon 5xxx and 6xxx cards.

 

[rodrigomarrafao]

nope no problems at all , no stutter , simply running smooth as butter 🙂

Thanks. Will try a clean install on weekend. Maybe it helps.

 

[slim0287]

I am about to update my late 2013 iMac to Big Sur by following the instructions in:

GitHub - barrykn/big-sur-micropatcher: A primitive USB patcher for installing macOS Big Sur on unsupported Macs

A primitive USB patcher for installing macOS Big Sur on unsupported Macs - barrykn/big-sur-micropatcher

github.com

For what it's worth, my iMac has an SSD, not a Fusion drive.

Once I do so, will I receive OS updates through the normal process? (i.e., not have to go through the micropatcher every time).

 

[jowaju]

Seems apple take awareness of EFI bricking on supported BigSur Mac (both Haswell architecture as iMac14,1 BigSur unsupported):

If you can’t install macOS Big Sur on certain 13-inch MacBook Pro computers from 2013 and 2014 - Apple Support

Follow these steps if you can't install macOS Big Sur on a MacBook Pro (Retina, 13-inch, Late 2013) or MacBook Pro (Retina, 13-inch, Mid 2014).

support.apple.com

I also read that the new BigSur 20B50 update blocks the update on those affected machines, making them temporary unsupported.

I can confirm with the 20B50 installer package attempting to boot to the USB installer simply produces a prohibited sign. After patching the USB installer, it boots right up and installs with no issues. This is on a Mid 2014 13" MacBook Pro.

 

[justperry]

For timestamp purposes, I restarted my machine at 2PM (14:00) to make it easy. So, I am copying just that section of the log in the link above. Please let me know if I can share anything else to assist in the troubleshooting process.

Thanks!

Where's the link?

 

[justperry]

Big Sur Beta 11.1 (20C5048l) is available: http://swcdn.apple.com/content/down...cwguho5q4zmxns1zw9qivaui/InstallAssistant.pkg

Available Products:
1. macOS Big Sur Beta 11.1 (20C5048l)
- 001-83606 - Added 2020-11-20 18:12:29

Where did you get that link, I don't see it in the sucatalog?

Edit, I downloaded it, mounted the Sharedsupport.dmg, copied the zip to an external disk, unzipped it and opened the SystemVersion.plist, it is indeed 11.1
Cheers

 

[justperry]

I also have 2012 Mac mini. Do you have problems with top bar taking something like 20s to load? Also the screensaver are lagging hard. Something like 2-3 fps. Do you have any problems like these? Maybe I should do a clean install?

Depends on which screensaver, drift (screensaver) is jerky on my Mac Mini as with other Users here, has been mentioned before.

 

[Jack Neill]

Depends on which screensaver, drift (screensaver) is jerky on my Mac Mini as with other Users here, has been mentioned before.

Drift is slow and laggy on my 2012's on Catalina and BS. I think the 4000 just can't handle it in 2020

 

[Quackers]

Where's the link?

Lol, the link was there before.
I looked at it before and will get it back.

https://************/6s4xo

Nope - won't post //justpasteit

 

[justperry]

Drift is slow and laggy on my 2012's on Catalina and BS. I think the 4000 just can't handle it in 2020

Ok, I never use any screensaver, I just pointed out that it has been mentioned before.
Good to know it was also slow on former OS versions.
The only thing this Mini is slow is the Graphics, but it isn't as bad for daily use.

 

[TA 455SD]

Drift is slow and laggy on my 2012's on Catalina and BS. I think the 4000 just can't handle it in 2020

I have both Catalina on a 2012 mac mini and Big Sur on another 2012 mac mini machine with the 2.5 GHz cpu and they both run Drift screensaver with no lag and no stutter , so I know they can do it well , I have Samsung EVO 500GB SSD and 16 GB RAM in both machines

 

[MacHacJac]

Please help! My iMac late 2013 dont sleep. He is awake and he is not password protected. 🙁

Open a Terminal window and try the following command:
sudo pmset -b disablesleep 0
Let me know if it works.

 

[MacHacJac]

Just a random question, how do you do the thing where you can have a line of code on macrumors and it’s surrounded by like a gray background?

 

[Quackers]

Just a random question, how do you do the thing where you can have a line of code on macrumors and it’s surrounded by like a gray background?

Like this?

click on the 3 dots next to the smiley face and select the right hand one - code

 

[BigSURfur]

I ask this one more time. Has anyone been able to boot Big Sur off a RAID 0? Or is anyone trying at all?

 

[buckrock]

Like this?

click on the 3 dots next to the smiley face and select the right hand one - code

Or do you mean like this?
Click the first set of three dots by Bold and Italics and chose 'Inline Code'.

 

[Brandis]

Trying to download the Install Assistant from https://swcdn.apple.com/content/downloads/50/49/001-79699-A_93OMDU5KFG/dkjnjkq9eax1n2wpf8rik5agns2z43ikqu/InstallAssistant.pkg but always get white page with the following error message:

An error occurred while processing your request.
Reference #30.648b37d5.1605909163.11fbfe9d

Is this a known issue?

Want to get my Late 2012 iMac onto Big Sur.

 

[buckrock]

Where did you get that link, I don't see it in the sucatalog?

Edit, I downloaded it, mounted the Sharedsupport.dmg, copied the zip to an external disk, unzipped it and opened the SystemVersion.plist, it is indeed 11.1
Cheers

Download gibMacOS-master at GitHub. Run GibMacOS.command in Terminal. After switching catalogs you can look at the url, download the sucatalog, look at in TextEdit and search for the pkg.

And ... just to be precise, the version is Beta 11.1 (20C5048l). It is not a final release -- just the first of probably many betas for 11.1.

 

[Ausdauersportler]

Just a random question, how do you do the thing where you can have a line of code on macrumors and it’s surrounded by like a gray background?

use this code tags to get the grey box:

[code]your fabulous grey boxed code[/code]

and this inline code tags to get the blue inline code

[icode]your fabulous inline code[/icode]

 

[justperry]

Download gibMacOS-master at GitHub. Run GibMacOS.command in Terminal. After switching catalogs you can look at the url, download the sucatalog, look at in TextEdit and search for the pkg.

And ... just to be precise, the version is Beta 11.1 (20C5048l). It is not a final release -- just the first of probably many betas for 11.1.

Done..and working including Wifi
(See screenshot + 256 GB SSD + 500 GB HDD)

 

[justperry]

Download gibMacOS-master at GitHub. Run GibMacOS.command in Terminal. After switching catalogs you can look at the url, download the sucatalog, look at in TextEdit and search for the pkg.

And ... just to be precise, the version is Beta 11.1 (20C5048l). It is not a final release -- just the first of probably many betas for 11.1.

Wasn't and still isn't available on https://swscan.apple.com/content/ca...ion-snowleopard-leopard.merged-1.sucatalog.gz

 

[lesliewong]

Downloaded and installed 11.1 beta with no problems.

2012 MacBook Pro Retina 15", i7-3615QM 2.3GHz (MacBookPro10,1) with upgraded 1TB SSD and Broadcom BCM94360CSAX Airport

I have Big Sur, Catalina and Windows 10 (Insider) partitions on my MBPr and I'm starting to think that I may no longer need Catalina.

Thanks, @buckrock for the InstallAssistant.pkg link.