Got a tip for us?
Let us know
Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
macOS 11 Big Sur on Unsupported Macs Thread
- Thread starter dosdude1
- WikiPost WikiPost
- Start date
-
- Tags
- 10.16 macos unsupported
- Sort by reaction score
- Status
Hi!
I assume you normally use OpenCore to spoof anther board-id to get your AMD Vega 56 GPU working. Just boot into this existing OpenCore installation and then boot Big Sur. The GPU should be detected by the OS.
Have the very same unexpected issue with AMD cards in iMacs 2009-2011 (RX460, RX560 and RX580) but only after patching. It is working fine after the basic installation without OpenCore, but graphics is gone after running the patch-kext.sh
Have success!
Try clearing the USB before using the app. Is it more than 16Gb? I have not had any problem
You can only update a Catalina version not to install a new Big Sur version. "
PLEASE READ BEFORE DOING ANYTHING!
Errata: For now do not format the disc, this patch so far only makes it possible to update Catalina for Big Sur, if you happen to have formatted it, you will have to go back to Catalina, or use a method that I can explain in the comments or in another video."
I have updated from the Big Sur RC2 version to the final version with this method, and without any problem.
New installation I haven't tried it, but it creates a patched USB installer, so I don't see why they should have problems doing it. Greetings
I can confirm same error message as above.......using the patcher> Im comfortable in terminal its not a biggie I just wanted to try to reproduce the issue. Its a no go for me. I even tried creating a patched installer on a used and brand new 32GB card on both a MacBook that support Catalina natively and my Mac Pro which is a 5,1. Same formatting error one both system with two different drives. Recommendation would be go open core if your not comfortable using terminal or barrykns micro patcher until this one is fixed.
Don't connect to your Apple ID during install. I got caught up with a small box that I couldn't get out of. Selecting "Not Now" or whatever it said let me progress through the install.
For MBP mid-2012, they have found temperature changes between Catalina and Big Sur?
(it has been mentioned in the thread, problems since BS b1)
I have applied the jackluke instruction, the keyboard does not heat up quickly anymore.
wi-fi... and smc??
ok I don't know what fixed it those of you who are getting that error message with unable to mount drives. If you boot into safe mode it works perfectly fine. I was also getting this same message with dosdudes patcher in the early days of Catalina when it came to making the install. Im not an expert by any means but I think it has something to do with the patched legacy usb kexts.
Last edited:
I have a mid-2011 27" iMac with a K4100M and upgraded BT module. Details in the sig. Did the install and it went ok, but I don't have any sound. Maybe I skipped a step somewhere along the line but I thought it was supposed to work?
Looks like I need to do part of step 15, even though I have an upgraded video card. I'll try that and post back.
Had to run the post install patches in step 15 to get sound to work. The beginning of step 15 told me to stop if I had my GPU upgraded which may need to change. For a mid-2011 27" iMac, you for sure need to run the post install patches even if you have an upgraded GPU, BT, and WiFi module.
Looks like I need to do part of step 15, even though I have an upgraded video card. I'll try that and post back.
Had to run the post install patches in step 15 to get sound to work. The beginning of step 15 told me to stop if I had my GPU upgraded which may need to change. For a mid-2011 27" iMac, you for sure need to run the post install patches even if you have an upgraded GPU, BT, and WiFi module.
Last edited:
I don't want to update my Catalina system before to test a fresh install on an external SSD. Caution should be taken before making an update without really knowing all the problems that one may encounter afterwards. Thank you for your post while waiting for the author of the video to indicate how to install Big Sur without going through an update
Late 2013 - 27 iMac
installation went smoothly and with out issues:
1. there was a warning when i first logged in about optimizing (how long does it take, how can i track it, or see what is happening?
anyone experienced this issue or alert ??
thx
installation went smoothly and with out issues:
1. there was a warning when i first logged in about optimizing (how long does it take, how can i track it, or see what is happening?
anyone experienced this issue or alert ??
thx
Sorry for asking - might have been asked many times in those 247 pages...
But here it is. I have a late 2012 iMac, 32GB ram, replaced the fusion drive with a 1TB SSD.
My performance should be alright?
How are the patches / regular Apple OS updates working? Just like usual stuff?
- Sorry but where is the guide for iMac 2012?
But here it is. I have a late 2012 iMac, 32GB ram, replaced the fusion drive with a 1TB SSD.
My performance should be alright?
How are the patches / regular Apple OS updates working? Just like usual stuff?
- Sorry but where is the guide for iMac 2012?
Got to the first page and check out your patcher options. Read the docs coming with the micro patcher.
Hey Guys, can anyone point me to how to load BS on a 2012 MacBook Pro, don't really want to read 247 pages. Will this work on the official release of BS not beta.
Thanks to all who made this possible! Performed an in-place upgrade to Big Sur on my 2012 Mac Mini. Even the wifi patching was incredibly painless. Computer is running extremely smoothly on an 512GB Intel SSD and the other specs listed above.
Start of by reding the first post in this thread, next read the last few pages, start from when Big Sur was released yesterday.
You need:
Big Sur installer
Micropatcher, read the instructions there as well.
USB medium to make a Big Sur Installer
How do I run this command on Big Sur?
I need to enable Continuity on my mid-2011 27" iMac:
sudo /usr/libexec/PlistBuddy -c "Set:Mac-942B59F58194171B:ContinuitySupport true" "/System/Library/Frameworks/IOBluetooth.framework/Versions/A/Resources/SystemParameters.plist"
Tried the traditional Catalina method by booting into the Big Sur Install volume and ran the usual csrutil disable, etc but the change didn't save.
Any ideas?
I need to enable Continuity on my mid-2011 27" iMac:
sudo /usr/libexec/PlistBuddy -c "Set:Mac-942B59F58194171B:ContinuitySupport true" "/System/Library/Frameworks/IOBluetooth.framework/Versions/A/Resources/SystemParameters.plist"
Tried the traditional Catalina method by booting into the Big Sur Install volume and ran the usual csrutil disable, etc but the change didn't save.
Any ideas?
Last edited:
Yes it does, it still amazes me why the heck it's unsupported, especially since the internals are comparable to the 2012 MBP which was sold until November 2012 which should be supported by Apple but didn't either.
Big Sur runs like a charm on these macs.
You can't modify the bootdrive if is not readable!
Command does not work if the bootdrive is not read/write.
How do I do that so it is read/write? I did the usual csrutil disable, sudo mount -uw / (which didn't work), and csrutil enable.
Is there a certain method that I have to follow for Big Sur?
It's not that hard for a 2012 machine, I explained what steps are needed in a post a few pages back, search my history for it, I will link to it shortly in this post, will edit this post.
Edit: This works for a 2012 Mac Mini and a 2012 MBP, probably also other MBPros from the same year, I would suggest to also read the manual on this site.
Link
https://forums.macrumors.com/thread....2242172/page-241?post=29221192#post-29221192
1. Have a USB stick handy, or an external disk, or a dedicated partition.
2. Download the full installer.
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 of 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. Start up again and 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 "/Volume/Image\ Volumes/patch-kexts.sh /Volumes/***" and hit enter, when finished enter "reboot", both without the quotes.
*** Is your disk label
Voila...done...a working Big Sur OS.🍺🍺
Edit: Do not forget to thank Barry K. Nathan
Last edited:
I just completed the process following the step by step instructions on this guide
github.com
It worked perfectly on my late 2013 iMac! Thank you so much for working on this patch!
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
It worked perfectly on my late 2013 iMac! Thank you so much for working on this patch!