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macOS 11 Big Sur on Unsupported Macs Thread

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The first post of this thread is a WikiPost and can be edited by anyone with the appropiate permissions. Your edits will be public.
Underbeat88 said:
Hi guys. Is there a significant difference between Micro Patcher and Patcher Sur? Which of these patches should I use when upgrading to Big Sur on a 2011 iMac 27 with Quadro K4100M? Or is there no fundamental difference?
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AFAIK your Mac won't run BS well, no Metal support, someone else-correct me if I am wrong.
 
justperry said:
AFAIK your Mac won't run BS well, no Metal support, someone else-correct me if I am wrong.
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It should work. As far as I know, there are almost all kexts for the system to work properly. I'm just not sure which of the suggested patchers is the best to use in my case.
 
justperry said:
I again got the error below, the third time in about 1.5-2 months, not too worried about it since running BS on a 2012 Mac Mini, so unsupported.

View attachment 1689354View attachment 1689355
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Possibly you should use opencore and the eficheck blocker :) or we try to install there very same EFICheckDisabler.kext directly onto the system. Could be an option to my next private patcher version .... if it works.
 
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Really different question:

Has anybody a working setup to recompile the setvar EFI programs available (possibly on MacOS) with the @Barry K. Nathan micro patcher?

I wanted to add back the amfi_allow_any_signature=1 to enable Night Shift with the @jackluke patched CoreBrightness.framwork (problems solved, now).

Currently I am struggling to find out which version of the EFI libs to install and how to compile on the Mac, I got rusty in these things.
 
MacHacJac said:
Kind of a random, but important (to me at least) question:

In catalina and before, in the sharedsupport folder, there are a bunch of DMGs, including basesystem.dmg. Is there something like that in big sur? Where? If not, how does apple get around the fact that there is no basesystem.dmg in the installer app?
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It is in different place

bigsur.PNG
 
jackluke said:
but before doing this to avoid any annoying "platform not supported (verbose message)" or prohibitory symbol, I removed these files (equivalent to "-no_compat_check"):
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I am trying to modify these from within Catalina, but I can't mount those volumes. Any hints how to mount them (writable)
 
Underbeat88 said:
Hi guys. Is there a significant difference between Micro Patcher and Patcher Sur? Which of these patches should I use when upgrading to Big Sur on a 2011 iMac 27 with Quadro K4100M? Or is there no fundamental difference?
Click to expand...
AFASIK they both use Barrys Micro Patcher , and BenSovas Patched Sur has a GUI that makes it easy process , more automated , which is what I used , I have 2 identical mac mini , Big Sur on one and Catalina on the other , just for comparisons , will probably use Barrys Micro Patcher on the Catalina device just because I have not tried it yet , probably after a newer final version is released , no hurry since I do have a perfectly running Big Sur on one of them
 
Some feedback on Patched Sur upgrade on an iMac 11,1 running DOSDude's patched Catalina:

The patch process completes and the USB Boot Drive "Install macOS Big Sur" is created successfully. However upon restarting, when the USB Boot Drive "Install macOS Big Sur" is selected, the Apple Logo briefly appears with a status bar and then the machine reboots. In other words, nothing happens to start the install of Big Sur.

I've tried it many times with two different USB Drives. The same drives used to get it up to Catalina with no issues.
 
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BradleyF said:
Some feedback on Patched Sur upgrade on an iMac 11,1 running DOSDude's patched Catalina:

The patch process completes and the USB Boot Drive "Install macOS Big Sur" is created successfully. However upon restarting, when the USB Boot Drive "Install macOS Big Sur" is selected, the Apple Logo briefly appears with a status bar and then the machine reboots. In other words, nothing happens to start the install of Big Sur.

I've tried it many times with two different USB Drives. The same drives used to get it up to Catalina with no issues.
Click to expand...
Possibly you missed the main information of needing an open core setup to boot from. Your machine cannot boot the Big Sur Kernel without it....search for @khronokernel or check out my fork of the micro patcher described shortly in this post...

P.S.: If you have not upgraded your GPU is is probably not worth a try. Could be simply frustrating in the end.
 
Quackers said:
I'm not seeing any anomalies. What are you seeing?
Are you using the Nvidia card - that seems to be Big Sur's default choice together with no graphics switching.
You can get the Intel card to work as the default (and then graphics switching does work) by running the terminal command
sudo launchctl stop com.apple.displaypolicyd
But this has to be run after every reboot.
Or at least on my mid 2012 rMBP
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"sudo launchctl disable system/com.apple.displaypolicyd" you don't need to run every reboot..
 
Ausdauersportler said:
Possibly you missed the main information of needing an open core setup to boot from. Your machine cannot boot the Big Sur Kernel without it....search for @khronokernel or check out my fork of the micro patcher described shortly in this post...

P.S.: If you have not upgraded your GPU is is probably not worth a try. Could be simply frustrating in the end.
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Yes! I did miss that! Thank you @Ausdauersportler! But I don't understand your comment about the GPU. Here why: I'm already running Catalina (ATI Radeon HD 4850 GPU) and it works great. So, are you saying that BS will be a problem on it? I don't have to upgrade to BS if, in your expert opinion, it won't be good performance.

Thoughts?
 
BradleyF said:
Yes! I did miss that! Thank you @Ausdauersportler! But I don't understand your comment about the GPU. Here why: I'm already running Catalina (ATI Radeon HD 4850 GPU) and it works great. So, are you saying that BS will be a problem on it? I don't have to upgrade to BS if, in your expert opinion, it won't be good performance.

Thoughts?
Click to expand...
Reading the first post off this thread will open your eyes wide: While the 4xxx series worked pretty well with Catalina (if you ignore the already apparent missing metal features like the "all photos tab" in the photo app) you will get no graphics acceleration with Big Sur. The complete GUI has been reworked to rely on metal capable graphics cards and I assume we will unlikely see a fast solution for this - if ever....

The core2duo Late 2009 can be modded with a Metal GPU (e.g. cheap K610M) but your will loose brightness control, boot screen and some other things...take a look and my signature and check out both first posts...
 
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Ausdauersportler said:
Reading the first post off this thread will open your eyes wide: While the 4xxx series worked pretty well with Catalina (if you ignore the already apparent missing metal features like the "all photos tab" in the photo app) you will get no graphics acceleration with Big Sur. The complete GUI has been reworked to rely on metal capable graphics cards and I assume we will unlike see a fast solution for this - if ever....

The core2duo Late 2009 can be modded with a Metal GPU (e.g. cheap K610M) but your will loose brightness control, boot screen and some other things...take a look and my signature and check out both first posts...
Click to expand...
@Ausdauersportler: This is very helpful. I've read through the posts you mention and, also, based on your comments above, I'm going to pass on upgrading this old iMac. It's had a good run and works fine for me as an android and iOS development machine on Catalina.

Thanks again for the expert opinion!

*B
 
BradleyF said:
@Ausdauersportler: This is very helpful. I've read through the posts you mention and, also, based on your comments above, I'm going to pass on upgrading this old iMac. It's had a good run and works fine for me as an android and iOS development machine on Catalina.

Thanks again for the expert opinion!

*B
Click to expand...
Check the first post of this thread regularly - if something happens with the GPU acceleration you will find it there..
 
Short update on iMac Late 2009 to Mid 2011 patching:

With the help of @hvds and @Pascal Baillargeau I could solve the Night Shift problem in my fork of the @Barry K. Nathan patcher.

Using the --ns with the patch-kext.sh call installs the @jakeluke patched CoreBrightness.framework and works now on my iMac together with Safari and Mail and....

Since my fork is just an enhanced version of the stock patcher it should work for all other users and their supported machines, too.

It needs the "amfi_allow_any_signature=1" or "-amfi_get_out_of_my_way=1" added to the boot-args in NVRAM!
 
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After installing Big Sur on my unsupported machine (Pro 15" Early 2013 i7), sometimes it crashes and appears the kernel panic screen and after that it turns off. And i need to wait to turn on because it wont turn immediatelly.

Any thoughts?
 
jorrrrrje said:
After installing Big Sur on my unsupported machine (Pro 15" Early 2013 i7), sometimes it crashes and appears the kernel panic screen and after that it turns off. And i need to wait to turn on because it wont turn immediatelly.

Any thoughts?
Click to expand...

Ah! And i can't turn off or put it to sleep because when i put it starts to crash and start to appear the kernel panic screen.
 
Underbeat88 said:
Hi guys. Is there a significant difference between Micro Patcher and Patcher Sur? Which of these patches should I use when upgrading to Big Sur on a 2011 iMac 27 with Quadro K4100M? Or is there no fundamental difference?
Click to expand...
That's the difference between a GUI and no GUI. You won't believe how important that is to most people. Sometimes Patched Sur is less reliable, but in the sense that some of the automated steps don't always work. (You can override the InstallAssistant.pkg download if you want, that's a big one that likes to fail).
 
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