#DOWNGRADE TO MACOS BIG SUR MAC OS#
#DOWNGRADE TO MACOS BIG SUR INSTALL#
#DOWNGRADE TO MACOS BIG SUR DRIVERS#
#DOWNGRADE TO MACOS BIG SUR FULL#
#DOWNGRADE TO MACOS BIG SUR PRO#

Once that is done read on for preparing the Destination computer > Special Notation - works on Intel Based Apple Computers & May on Apple Silicon M1 CPUĮxtra Special Notation regarding the Touch ID equipped Apple Computer. Example : Bootable Installer of Big Sur would have the done on a computer that Qualifies to run Big Sur. This will have to be performed from a Qualifying Computer to run the version of macOS to be made on the Bootable Installer. To perform this action will require booting from a Bootable Installer.

#DOWNGRADE TO MACOS BIG SUR MAC OS#

Is their a way to fix this issue, like try to update the recovery partition so it starts up in the Mac oS bigsur installer instead of the Mac oS Monterey beta installer? Any help would be greatly appreciated.

#DOWNGRADE TO MACOS BIG SUR INSTALL#

I did some research, and found out that internet recovery is gone on the new M1 macs, and internet recovery is different from standard recovery moad, and I guess when I rolled back to Mac oS bigsur it didn't update the recovery partition, because it still wants to install the Mac os Monterey public beta when I try to clean install Mac oS bigsur using recovery moad. Yesterday, however, I went to do a clean install of Bigsur using recovery moad, it was saying install Mac oS Monterey Beta instead of install Mac oS bigsur. A few weeks ago I enrolled my mac in the apple beta software program to try out the Mac os Monterey public beta, but then decided I wanted to roll back to Mac oS bigsur after I installed the beta, I did this by creating a Mac oS bootible install USB. Where is replaced with the physical core count of your CPU in hexadecimal.Hello, this is Stephen. The patches which need to be edited are all named algrey - Force cpuid_cores_per_package, and you only need to change the Replace value.

Requires SIP, Apple Secure Boot, and AMFI disabled.įor those on AMD CPUs, make sure to update your kernel patches (opens new window) for Ventura.ĭon't forget to update your patches as well with the core count of your CPU.

You will lose access to non-full updates (Small 1-3GB updates).

No support is provided for Hackintoshes using OCLP!.

You can use OpenCore-Legacy-Patcher (opens new window) to add back support

If using the same EFI to boot Monterey and below, add -igfxsklaskbl to your boot args.

Change your device-id and AAPL,ig-platform-id to the most similar Kaby Lake model.

Skylake can be spoofed as Kaby Lake with WhateverGreen v1.6.1 and up.

#DOWNGRADE TO MACOS BIG SUR PRO#

Skylake (HD 5xx/P5xx, Iris 5xx, Iris Pro 5xx/P5xx) All unsupported laptops (Haswell, Broadwell, Skylake) should use MacBookPro14,1.All desktops with unsupported iGPUs should use iMac18,1.Unsupported GPUs still require OCLP, while supported GPUs do not. All desktops with dGPUs should use iMac18,2, MacPro7,1 or iMacPro1,1.

#DOWNGRADE TO MACOS BIG SUR FULL#

If your SMBIOS was supported in Monterey and is not included above, you're good to go! Supported SMBIOSĬlick here for a full list of supported SMBIOS.įor those on architectures no longer supported by Ventura:

The pages for these CPUs will remain updated for Monterey.

Polaris GPUs remain unsupported on machines without AVX2īecause of these caveats, Dortania will no longer be supporting pre-Haswell CPUs for Ventura and above.

Delta updates (small 1-3GB updates) will no longer be available and you must install the full update (12GB), as delta updates only contain the non-AVX2 cache on Apple Silicon machines.

Apple may remove this cache at any time in the future if they add AVX2 support to Rosetta.

You can use CryptexFixup (opens new window) to force this dyld cache to be installed, but:

#DOWNGRADE TO MACOS BIG SUR DRIVERS#

Although the kexts can be patched (opens new window) or downgraded (opens new window), the Polaris GPU drivers and most of userspace rely on AVX2 too much to be able to be patched.Īpple has left a dyld cache that does not use AVX2 instructions in Ventura to support Rosetta on Apple Silicon machines, but this cache is not installed by default. Much of userspace now requires AVX2 support, along with AMD Polaris GPU drivers and some instances of AVX2 instructions in some kexts. MacOS Ventura drops support for pre-Haswell CPUs.

Getting started with ACPI (opens new window).

Downgrade to macos big sur