![]() I recommend checking out StarPlayrXs BigMac Patcher for those.Big Sur Workaround At first glance, it may seem impossible to install macOS Bug Sur on a machine that’s not supported. Note- 2008 Mac Pros do work with Big Sur, but not with this patcher. A new tool called ‘Patched Sur’, currently in beta, allows users to download and install macOS Big Sur on unsupported Macs.*MacBook Pro (13-inch, M1, 2020) MacBook Pro (13-inch, 2020, Two Thunderbolt 3 ports) MacBook Pro (13-inch, 2020, Four Thunderbolt 3 ports) MacBook Pro (16-inch, 2019).*Sadly, these Macs are way too old to even boot Big Sur, so they do not support this patcher. However, if the machine’s not too old, there’s still a way to install Big Sur on an unsupported Mac using a specially developed patcher tool.*Install macOS Big Sur on unsupported Macs with this Big Sur Patcher. For example, wifi or GPU drivers could be thrown all out of whack.Installing Big Sur on an unsupported Mac can’t be done the regular way through System Preferences gt Software update. Also keep in mind that these patches may work flawlessly, or have a ton of issues based on your model. Well, with the release of this new version which will be available on Apple Silicon-based Macs and which introduces a totally new design, Apple taught it was time. Yes, we are now looking at macOS 11, after roughly 20 years of macOS 10/Mac OS X incremental updates. I also restored PlatformSupport.Macos 11 Big Sur On Unsupported Macs FebruMacos 11 Big Sur On Unsupported MacsĭOWNLOAD: Macos 11 Big Sur On Unsupported Macsīig Sur on unsupported MacFirst thing first, the version number. *** commands to move newly built prelinkedkernel to /System/Library/PrelinkedKernels for kcditto to find *** I also restored ist by adding this change for MacPro 3,1 Sudo bless -folder /Volumes/BigSur/Users/howarth/mntpoint/System/Library/CoreServices -bootefi -create-snapshot Sudo cp /Library/Apple/System/Library/PrelinkedKernels/prelinkedkernel immutablekernel Sudo cp /Library/Apple/System/Library/PrelinkedKernels/prelinkedkernel prelinkedkernel *** commands to rebuild and move new prelinkedkernel to /System/Library/PrelinkedKernels for kcditto to find ***Ĭd /Volumes/BigSur/Users/howarth/mntpoint/System/Library/PrelinkedKernels *** TODO: find reliable command to trigger prelinked kernel build *** Use Kext-Droplet to add above kext files and reboot as requested *** *** reboot to make modified snapshot active root *** Sudo mount -o nobrowse -t apfs /dev/disk7s5 /Volumes/BigSur/Users/howarth/mntpointĬd /Volumes/BigSur/Users/howarth/mntpoint/System/Library/Extensionsīless -folder /Volumes/BigSur/Users/howarth/mntpoint/System/Library/CoreServices -bootefi -create-snapshot *** commands below remove the incompatible kext **** Īttach a usb memory stick with Kext-droplet.dmg and the following kexts files Ĭurl "" -progress-bar -L -o /private/tmp/prelinkedkernel Attach this drive under Catalina mount it's Preboot volume.Ĭd /Volumes/Preboot/*/System/Library/CoreServices/Ĭurl -progress-bar -L -o /private/tmp/ Install Big Sur on an external drive from a supported machine. rw-r-r- 1 howarth staff 25749489 Jul 5 09:31 prelinkedkernel.badĭropbox link to download the problem prelinkedkernel (compressed).ĭisable authenticated-root in nvram using csrutil from Big Sur from the root level of a patched Catalina usb installer with. Result from 'sudo kextcache -I / sudo kcditto' for the above kexts Legacy usb prelinkedkernel 1 howarth staff 19702112 Jul 5 06:54 prelinkedkernel The size of my prelinkedkernel.bad, attached, is larger than. IO80211Family.kext is loaded and has the same 1200.12.2 version. ![]() AppleIntelPIIXATA.kext is loaded and the DVD drive works. The loaded AppleHDA.kext has the same 281.52 version. When booted under your prelinkedkernel, I see that neither LegacyUSBInjector.kext nor LegacyUSBVideoSupport.kext appears to be loaded (which is the same behavior as under patched Catalina). However when I try to rebuild my own local copy of a prelinkedkernel with 'sudo kextcache -I / sudo kcditto', that prelinked kernel reboots in the middle of the boot process. On my MacPro 3,1, with AppleHDA.kext and IO80211Family.kext removed from /System/Library/Extensions and Kext-droplet used to install.įrom those in the Catalina Patcher app and with.įrom Catalina 10.15.5 installed, booting under your prelinkedkernel works. Can you briefly describe exactly which kext you replaced in Big Sur to create the prelinkedkernel from. ![]()
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