Legion 5 15IAX10 OpenCore

The OpenCore EFI, ACPI tables and config for running macOS on a Lenovo Legion 5 15IAX10 (machine type 83F0, BIOS S2CN26WW): Intel Core Ultra 9 275HX (Arrow Lake-HX), NVIDIA RTX 5070 Laptop (10DE:2D18), Intel iGPU (8086:7D67), MediaTek MT7925 Wi-Fi and Bluetooth, Realtek RTL8111 Ethernet, WD SN7100S NVMe, 2560x1600 165 Hz panel. It runs macOS Tahoe 26.7.1 (25G241) as my daily system, with macOS Sequoia 15.8.1 also booting from the same EFI. This is the config as it runs here, with the machine identity replaced by placeholders.

Most of the hardware needed its own driver, which is why this org exists. The config ties them together.

Windows stays on its own ESP and is started with F12 and Windows Boot Manager, never from the OpenCore picker (the Mac SMBIOS would leak into it).

EFI/OC/config.plist is the live config with the four identity fields set to OpenCore's sample placeholders. Everything else is as it boots here, including the DEBUG logging target (it writes opencore-*.txt to the EFI partition; harmless with a RELEASE build).

The .dsl sources are in ACPI/. The 11 ACPI > Patch entries come from scripts/dsdt_patches.py, each with its reason: two module-level If (PCHA != Zero) blocks turned into scopes (macOS's ACPICA rejected the whole DSDT otherwise), a scope retarget, three Name + Store pairs turned into methods (sideband and USB port visibility), four _UPC fixes in Lenovo's USB table so the keyboard (HS05), Bluetooth (HS14), webcam (HS11) and a USB-A port (HS02) are connectable under macOS, and the _PTS rename.

Binaries are not in this repository. Get each from its release page; the versions are the ones running here.

Audio on Tahoe is VoodooHDA in /Library/Extensions, not injected by OpenCore. Graphics is NvGfx's installer package.

OpenRuntime.efi, OpenHfsPlus.efi, ResetNvramEntry.efi, ToggleSipEntry.efi from OpenCore 1.0.8; LegionCbmrFix.efi 1.0.0 from this org. OpenShell.efi as the only tool.

• Kernel > Emulate: Cpuid1Data spoofs a Comet Lake CPU (family 6 model 0xA5); XNU rejects the real family 6 model 0xC6.
• Kernel > Quirks: ProvideCurrentCpuInfo (hybrid CPUs need it; without it the boot hangs at EXITBS:START), DisableIoMapper and DisableIoMapperMapping (with AppleVTD on, the NVIDIA driver reads IOMMU addresses from the BARs and refuses the card), AppleXcpmCfgLock, DisableLinkeditJettison, PanicNoKextDump, PowerTimeoutKernelPanic, SetApfsTrimTimeout -1.
• Booter > Quirks: ForceExitBootServices (a real hang at ExitBootServices without it), ResizeAppleGpuBars 0 (the RTX 5070 boots with an 8 GB BAR1; NvGfx resizes it back up itself), SetupVirtualMap off, DevirtualiseMmio off, the usual rest on.
• UEFI > Quirks: ReleaseUsbOwnership, RequestBootVarRouting, ResizeGpuBars -1.
• Misc > Boot: no picker (ShowPicker false, hold Option or Esc while OpenCore starts to get it), LauncherOption Full so OpenCore stays first in the firmware boot order, Timeout 0.
• Misc > Security: SecureBootModel Disabled, Vault Optional, ScanPolicy 0.
• NVRAM: csr-active-config 0x0A43 (unsigned and unapproved kexts, for NvGfx and VoodooHDA), WriteFlash false, the two BlueToolFixup keys, revcpuname for the CPU name.
• PlatformInfo: MacBookPro16,1, ProcessorType 0x0F01 (the Comet Lake spoof makes OpenCore pick a type macOS cannot name with 24 cores).
• boot-args: -v keepsyms=1 debug=0x100 (a panic stays on screen), -vi2c-force-polling, revpatch=sbvmm,cpuname revcpu=1, the NvGfx set (nvfb=1 nvaccel=1 nvfbheads=4 -nvkmsnosmooth -nvaccelnoheadless nvrmacpibl=1 nvrmphysctl=1 nvrmnvpcf=1 nvrmtgp=1 nvfbhidpi=1 nvrmdiag=1), the AMFI relaxations NvGfx's plugin needs (amfi_get_out_of_my_way=0x1 amfi=0x80 ipc_control_port_options=0), and alcid=18 for Sequoia.

Secure Boot off (OpenCore and the drivers are unsigned). The panel can be driven by either GPU and the firmware changes its mind between boots; NvGfx handles the NVIDIA case, WhateverGreen keeps the iGPU usable for the other. Legion Space on Windows was set to GPU Working Mode dGPU, Performance profile. Resizable BAR stays on.

1. Read the OpenCore install guide first; this repository replaces the "build your EFI" part for this laptop, nothing else.
2. Build EFI/OC/Kexts/ from the table above, EFI/OC/Drivers/ and EFI/BOOT/BOOTx64.efi from OpenCore 1.0.8 (DEBUG if you want the logs) and LegionCbmrFix. MANIFEST.txt lists the sha256 of every file on my EFI partition, so you can check yours against it.
3. Generate your own identity with GenSMBIOS for MacBookPro16,1 and put it in PlatformInfo > Generic (the four placeholder fields). Do not boot with the placeholders.
4. Boot from USB (F12), install, then copy the EFI to its own partition. The Windows ESP on this laptop is 200 MiB and holds a custom boot shim, so I made a second EFI partition for OpenCore and let LauncherOption Full register it first in the firmware boot order.
5. After the first desktop: sudo pmset -a sleep 0 hibernatemode 0 disksleep 0 standby 0, then the NvGfx package, VoodooHDA, and mtkwifi from the driver repos.

Rollback: F12 and pick the USB stick with a known-good copy of this EFI. Nothing here writes to firmware NVRAM.

• scripts/dsdt_patches.py: the patch list with reasons, and a tester that applies them to a dumped DSDT so you can load the result in acpiexec before booting.
• scripts/x2apic_to_lapic.py: builds APIC-legacy.aml from the firmware MADT.
• scripts/sanitize_config.py: what produced EFI/OC/config.plist from the live one.

acidanthera (OpenCore, Lilu and the kexts above), Dortania (the guides and the shutdown fix pattern, RehabMan's FixShutdown), VoodooI2C, Mieze, 1Revenger1, NullMoth Systems (the NVIDIA driver NvGfx forks), the Clover team (VoodooHDA), thanhnndev (itlmt7925, the first MT7925 driver for macOS), saspol (UltraWake, the Arrow Lake GPE 0x6B/0x6E self-wake analysis we will follow when sleep is turned on), johnfanv2 and the LenovoLegionLinux contributors (the S2CN EC and WMI fan map).

The .dsl sources, scripts and config in this repository are ISC (LICENSE). SSDT-PLUG-ALT.aml is compiled from OpenCorePkg's sample (BSD-3-Clause).