Obscure 2 black screen how to#
Obscure 2 black screen mac os x#

Haswell and newer only need AppleXcpmCfgLock.Missing CFG or XCPM patches, please enable AppleXcpmCfgLock and AppleCpuPmCfgLock.Note outdated kernel patches will also have the same effect please ensure you're using the latest patches from AMD OS X.Clover uses MatchOS while OpenCore has MinKernel and Maxkernel) Missing kernel patches (opens new window)(only applies for AMD CPUs, make sure they're OpenCore patches and not Clover.This section will be split between Intel and AMD users: # AMD Users Note: 1 means it supports MATs, while 0 means it does not.

Obscure 2 black screen how to#

Issue is it's not always obvious if an OEM has updated the firmware, you can check the OpenCore logs whether yours supports it( See here how to get a log): Regarding MATs support, firmwares built against EDK 2018 will support this and many OEMs have even added support all the way back to Skylake laptops.

Enable DevirtualiseMmio and follow MmioWhitelist guide (opens new window).

With EnableWriteUnprotector and disable RebuildAppleMemoryMap + SyncRuntimePermissions)

Boot with the old firmware quirk combo(ie.

Dell Inspiron 5370) even with MATs support will halt on boot up, in these cases you'll have two options:

If your firmware supports MATs(2018+ firmwares):.

Another issue may be that macOS is conflicting with the write protection from CR0 register, to resolve this we have 2 options:.

X299 2020+ BIOS updates(This applies to other X299 boards on the latest BIOS that released either in late 2019 or 2020+).

Many B450 and X470 boards with late 2020 BIOS updates are also included.

AMD's B550 and A520(Latest BIOS on X570 are also included now).

Intel's Comet Lake series(B460, H470, Z490, etc).

However, certain firmwares(mainly 2020+) do not work with this quirk and so may actually cause this kernel panic:.

Mainly Z390 and older require this quirk enabled.

This quirk is required for the majority of firmwares and without it it's very common to kernel panic here, so enable it if not already.

For X99 users, disable this quirk as it breaks with some firmwares.

Certain MMIO spaces are still required to function correctly, so you'll need to either exclude these regions in Booter -> MmioWhitelist or disable this quirk outright.

The main culprits to watch for in the Booter section are:

This section will be split into 3 parts, so pay close attention: Reboot on 'AppleUSBHostPort::createDevice: failed to create device' on macOS 11.3+.Stuck at Forcing CS_RUNTIME for entitlement in Big Sur.Kernel panic on 'Wrong CD Clock Frequency' with Icelake laptop.Kernel Panic AppleACPIPlatform in 10.13.Kernel Panic AppleIntelCPUPowerManagement.Kernel Panic Cannot perform kext summary.Black screen after IOConsoleUsers: gIOScreenLock.Stuck on or near IOConsoleUsers: gIOScreenLock./gIOLockState (3.'Waiting for Root Device' or Prohibited Sign error.

Stuck on RTC., PCI Configuration Begins, Previous Shutdown., HPET, HID: Legacy.

Obscure 2 black screen mac os x#

Stuck on This version of Mac OS X is not supported: Reason Mac.Stuck on Plist only kext has CFBundleExecutable key.Stuck on OCABC: Memory pool allocation failure - Not Found.Stuck on OCB: LoadImage failed - Security Violation.Stuck on Err(0圎) when booting preboot volume.Stuck after selecting macOS partition in OpenCore.Getting started with ACPI (opens new window).