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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.
Barry K. Nathan said:
I have just released Big Sur Micropatcher v0.5.1. Release notes:

For now I've skipped many pages of old forum posts (roughly 15 pages I'd guess), but I'll see if I can catch up on them later (maybe this weekend?).

The final Big Sur release is taking a while to download, and there's other stuff I have to deal with today, so I might not be able to test it with my patcher until tomorrow. 11.0.1 RC2 works, though, so I expect the final release will as well.
Click to expand...
Thanks very much.
But is it possible download Big Sur InstallAssistant.pkg ?
 
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vincenzo79 said:
Thanks very much.
But is it possible download Big Sur InstallAssistant.pkg ?
Click to expand...
I might try adding a downloader to my patcher tomorrow or this weekend.

Right now Apple's servers are being hammered. My download failed after 9.5GB and it won't resume for me, so I might give up for today and just download it tomorrow.
 
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jackluke said:
Right, BigSur since beta 1 caused on any unsupported Mac overheating (I have even a doubt that those few who EFI bricked instead of OTA spoofing was a logic board overheat), because smc sensors are not correctly detected (probably are required some additional kext), I made a simple app from BigSur recovery environment, based on this: https://github.com/hholtmann/smcFanControl

I attach also my customised shell app, run it directly from Downloads folder double click "smc.command" (use sudo -s and drag n drop in terminal) , for your MBP to detect average temperature use "CPU temp for Ivy Bridge" function.

Or you can use "Macs Fan Control" but "Auto" on BigSur won't work, just customise your CPU temperature range for adeguate RPM speed.
Click to expand...
Thanks!! right now it looks normal, but im thinking there is something wrong with my fan... maybe disconnected?
 

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justperry said:
Download this
Next go to this
then RTFM. ;)
Click to expand...
Now the longer version (This version has been updated a few times to reflect changes)

This is for a 2012 Mac Mini and almost sure for the MBP from the same year, others, especially earlier macs need extra steps, for that read the manual on micropatcher page.

1. Have a USB stick handy, or an external disk, or a dedicated partition.
2. Download the full installer from here. This is not the latest, for newer ones check out the later pages of this thread.
3. Download Micropatcher from here.
4. Open Terminal.
5. sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia --volume /Volumes/Install\ macOS\ Big\ Sur\ Beta --volume /Volumes/***
*** is the disk label you install the Installer onto, so the USB stick, I dragged and dropped my USB stick onto the terminal, the path will be automatically added.
6. Input your password.
7. It will erase your disk so be aware not to chose the wrong one.
8. Input "Y" if asked to erase.
9. Wait until it's finished, could take a while dependable on what kind of media you use.
10. Unzip the downloaded micropatcher, drag the micropatcher.sh file onto the Terminal window, then enter.
11. In Terminal type sudo and then a space, next drag the install-setvars.sh onto the Terminal window, hit enter.
12. Restart after it is finished.
13. Hold Option key right after restart, keep holding it until you see the bootpicker.
14. Chose the EFI disk, it will instantly shut down.
15. Startup again, next again hold the option key for the bootpicker.
16. Chose the USB installer, wait for the installer to open.
17. Chose the disk you want Big Sur installed onto.
18. Wait for probably an hour or so (Have a coffee or a beer in the meantime 🍺 ) if you install from a USB stick, probably half of that if the installer resides on a SSD medium.
19. Restarts multiple times.
20. Almost done.
21. The next step is for WIFI, Wifi does not work OOTB on a 2012 Mini or 2012 MBP.
21a. Restart for the last time after it booted into Big Sur, you may restart before login or after login, makes no difference.
21b. Hold the Option key again to get into the USB installer, there are other ways but this one is the easiest, chose the USB installer, next open terminal from the menu.
21c. Input "/Volumes/Image\ Volume/patch-kexts.sh /Volumes/***" and hit enter, when finished enter "reboot", both without the quotes.
*** Is your disk label
21d. Type "reboot" without the quotes and hit enter.

Voila...done...a working Big Sur OS.🍺🍺

Edit: Do not forget to thank Barry K. Nathan
 
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those who are receiving errors/timeouts with downloads...according to my friend in PR there is an outage with a data center Fresno California there working on it. There prioritizing downloads from the Mac App Store first before all other methods of download. This text was sent to me alittle more then 30 minutes ago. Apple is working on it and plans to have it up by 9PM EST. So if your not downloading through the App Store you can expect timeout errors and network lost.
 
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