Just posted a petition, in case Apple considers updating the supported device list, hope this works: https://www.change.org/BigSurSupport
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macOS 11 Big Sur on Unsupported Macs Thread
- Thread starter dosdude1
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Did you even read this thread? Please wait for the patcher and don't make this thread 500 pages long asking about unibody 2012 which is a borderline supported machine.
Probably will work without workarounds. I have a Mac Pro 2009 (4,1 flashed to 5,1) with an aftermarket upgrade to an official internal ac/4.2 wireless board, and it uses the AirPortBrcmNIC driver. The factory wifi for a 4,1 system uses a 4331 driver, which I had to copy in from Mojave for Catalina to work. Now I can use stock Catalina. I'm not sure if the BT4.0 card uses the 4360 (driver still present in Catalina), but the 4.2 chipset should be good for Big Sur support.
Cool, can't wait for testing macOS 11 Beta on my SandyBridge CPU + Intel HD3000 (Legacy) and one with Nvidia Fermi (GF) Graphics #LOL, but I'm not (Big) Sur(e) are GeForce* NVDA ~GF ~GK drivers still found on SLE?
just wondering if running dosdude1 installer for 10.15 would install the wifi support?
For those as me that are playing in adding patches (Wifi, Audio and so on) and kext to the new BigSur "prelinkedkernel", I advise first to take a backup of the original kext that you are replacing, and second when you have a BigSur working desktop on unsupported machine take an entire backup of this folder: /System/Library/KernelCollections/
because if something goes wrong, without "kextcache or kmutil" working from BigSur single user mode, it's very hard to recover a valid kextcache, unless you re-install completely BigSur.
edit:
in theory there is also this other path to consider /Preboot/UUID-lettersnumbers/System/Library/Prelinkedkernels/
and this (from BigSur APFS Data Volume) /Library/KernelCollections/AuxiliaryKernelExtensions.kc
and this: /Library/Apple/System/Library/Prelinkedkernels/prelinkedkernel
because if something goes wrong, without "kextcache or kmutil" working from BigSur single user mode, it's very hard to recover a valid kextcache, unless you re-install completely BigSur.
edit:
in theory there is also this other path to consider /Preboot/UUID-lettersnumbers/System/Library/Prelinkedkernels/
and this (from BigSur APFS Data Volume) /Library/KernelCollections/AuxiliaryKernelExtensions.kc
and this: /Library/Apple/System/Library/Prelinkedkernels/prelinkedkernel
Last edited:
Hi ! For my mac mini 2012 16go ram & ssd do stay stable for update it on unsupported mac or install beta. But after for update ?
Thanks
Thanks
the 2013 iMacs support AVX2, this image shows the 4570r which is the 2.7GHz i5 In the 21inch iMacs at least, the 2.9 ghz should be the same I can't see why not
I can't wait for DosDude1 to make patching Big Sur more simplified! ?
Its gonna be fun installing Big Sur on our Macs!
Its gonna be fun installing Big Sur on our Macs!
I have the same problem:
mount_apfs: volume could not be mounted: Permission denied
mount: / failed with 66
I did both an upgrade from Catalina and then a clean install.
Apple must have put in new security measures.
mount_apfs: volume could not be mounted: Permission denied
mount: / failed with 66
I did both an upgrade from Catalina and then a clean install.
Apple must have put in new security measures.
Pretty much all the 2012 Mac mini needs is a wifi patch, that's all
I have gotten a bit farther and have an install on the ssd but now when booting it gets caught up on a grey Apple logo
Already try disabling SIP, but tried it again and also the nvram args from that post.
still no luck, root doesn't have write privileges on "/" from what I can see.
sh-3.2# mount -uw /
mount_apfs: volume could not be mounted: Permission denied
mount: / failed with 66
still no luck, root doesn't have write privileges on "/" from what I can see.
sh-3.2# mount -uw /
mount_apfs: volume could not be mounted: Permission denied
mount: / failed with 66
ok well that weird im wondering why they dropped support for the late 2013 imacs
Check from BigSur System Preferences if your main user has been converted to standard rather than admin, because during this patched installation sometimes the user permissions are not set correctly for the root user.
Ok after install and reboot it now get the forbitten sign? so it dont want to boot. i have a mac mini late 2012 what shall i do ?
You should try this: https://forums.macrumors.com/thread...unsupported-macs-thread.2242172/post-28592102
because the BigSur post-install apple scripts clear the nvram and re-enable csrutil.
Anyway I have used a different method, I use opencore as boot loader that's why I don't care much of that, this setup I use: https://forums.macrumors.com/threads/macos-10-15-catalina-on-unsupported-macs.2183772/post-28551389
If you want to test that you can install it near a BigSur installation or installer.
Doesn’t work for me, user is Administrator in system preferences, OS installed on separate Volume, but in the same APFS container. Could that be a reason?
I'm almost certain someone just drew a line through a list of Macs and decided which would be compatible or not.
Maybe is that, because in my BigSur "sudo mount -uw /" is correctly working I can replace any System folder files.
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I guess that's the issue then.
But how do you installed BigSur on fusion drive ?