MacHyperVSupport

Hyper-V integration services for macOS. Requires a Generation 2 virtual machine on Windows Server 2012 R2 / Windows 8.1 or higher. Windows Server 2016 is currently unsupported.

All Intel macOS versions are supported.

Supported Hyper-V devices and services

• Heartbeat
• Guest shutdown (with daemon)
• Time synchronization (with daemon)
• Host to guest file copy (with daemon)
• PCI passthrough (partial support)
• Synthetic graphics (partial support)
• Synthetic keyboard
• Synthetic mouse
• Synthetic network controller
• Synthetic SCSI controller

Binaries

• MacHyperVSupport.kext: Core Hyper-V support kext for macOS 10.4 to 11.0.
• MacHyperVSupportMonterey.kext: Core Hyper-V support kext for macOS 12.0 and newer.
• hvfilecopyd: File copy userspace daemon.
• hvshutdownd: Shutdown userspace daemon.
• hvtimesyncd: Time synchronization userspace daemon.

OpenCore configuration

ACPI

• SSDT-HV-VMBUS: Enables correct Startup Disk operation, ensure patches described within are also configured.
• SSDT-HV-DEV: Required on Windows Server 2019 / Windows 10 and newer, provides proper processor objects and disables incompatible virtual devices under macOS.
• SSDT-HV-DEV-WS2022: Required on Windows Server 2022 / Windows 11 and newer, disables addiitonal incompatible virtual devices under macOS.
• SSDT-HV-PLUG: Ensures VMPlatformPlugin loads on Big Sur and above, avoids freezes with the default PlatformPlugin.

• Ensure all patches described in above SSDTs are present in ACPI->Patch.

Booter quirks

• AllowRelocationBlock - required for macOS 10.7 and older
• AvoidRuntimeDefrag - required
• ForceExitBootServices - required for macOS 10.7 and older
• ProvideCustomSlide - required
• RebuildAppleMemoryMap - required for macOS 10.6 and older

Kernel

• Quirks
  • ProvideCurrentCpuInfo - required for proper TSC/FSB values and CPU topology values.
• The following additional kernel extensions are required:
  • Lilu - patching and library functions
  • VirtualSMC - SMC emulator
• Block
  • com.apple.driver.AppleEFIRuntime
    • Required for 32-bit versions of macOS (10.4 and 10.5, and 10.6 in 32-bit mode). EFI runtime services and NVRAM are unavailable in those versions due to incompatiblities with the Hyper-V UEFI.
• Force
  • On older versions of macOS, the following kernel extensions may need to be Force injected. Refer to the OpenCore Configuration manual for details.
  • IONetworkingFamily (com.apple.iokit.IONetworkingFamily)
  • IOSCSIParallelFamily (com.apple.iokit.IOSCSIParallelFamily)
• Patch
  • Disable _hpet_init
    • Arch = i386
    • Base = _hpet_init
    • Comment = Disables _hpet_init due to no HPET hardware present
    • Count = 1
    • Identifier = kernel
    • MaxKernel = 9.5.99
    • Replace = C3
  • Disable IOHIDDeviceShim::newTransportString()
    • Arch = i386
    • Base = __ZNK15IOHIDDeviceShim18newTransportStringEv
    • Comment = Fix crash in IOHIDDeviceShim::newTransportString() caused by NULL _deviceType
    • Count = 1
    • Identifier = com.apple.iokit.IOHIDFamily
    • MaxKernel = 9.6.99
    • MinKernel = 9.4.0
    • Replace = 31C0C3
  • Disable scaling factor for X/Y mouse movement
    • Arch = i386
    • Base = __ZN16IOHIDEventDriver21handleInterruptReportE12UnsignedWideP18IOMemoryDescriptor15IOHIDReportTypem
    • Comment = Workaround for absence of AbsoluteAxisBoundsRemovalPercentage in 10.4
    • Identifier = com.apple.iokit.IOHIDFamily
    • Find = BA1F85EB51
    • MaxKernel = 8.11.99
    • MinKernel = 8.0.0
    • Replace = BA00000000
• Emulate
  • DummyPowerManagement and CPU spoofing may be required depending on the host CPU for older versions of macOS.

NVRAM

• Boot arguments
  • -legacy is required for running 32-bit versions of macOS (10.4 - 10.5, 10.6 if running in 32-bit mode). 64-bit applications and NVRAM support are unavailable in those versions.

UEFI

• Quirks
  • DisableSecurityPolicy - required on Windows Server 2019 / Windows 10 and newer

Installer image creation

• Installer images can either be passed in from USB hard disks, or converted from a DMG to a VHDX image using qemu-img:
  • DMGs need to be in a read/write format first.
  • qemu-img convert -f raw -O vhdx Installer.dmg Installer.vhdx

Boot arguments

See the module list for boot arguments for each module.

Credits

• Apple for macOS
• Goldfish64 for this software
• vit9696 for Lilu.kext and providing assistance
• flagers for file copy implementation and providing assistance
• Microsoft Hypervisor Top-Level Functional Specification
• Linux and FreeBSD Hyper-V integration services