NullMoth NVIDIA Driver for macOS

A Metal driver for NVIDIA Turing-and-later cards on Intel Macs and OpenCore systems running macOS 15 Sequoia. The device table includes GTX 16, RTX 20/30/40/50, TITAN RTX, and supported Quadro/RTX workstation cards. The driver implements NVIDIA-backed display and Metal interfaces. Feature availability and application behavior depend on the card, operating-system version and installed components; device-table coverage is not runtime qualification.

Made by NullMoth Systems.

Latest update: 1401 and NVIDIA driver 1.14.0. See the changes, validation and qualification scope before updating.

Something not working? Why a machine does not work, and how to fix it - every known problem, where it stops, why, and the fix.

Installing macOS from Windows? Use 1401: https://github.com/nullmoth/1401

This driver is new and may not work on every PC. It is tested on an RTX 5060 under macOS 15.7.x and 15.8.1. Device-table coverage is broader than physical hardware validation; see card support. If your PC does not boot macOS with OpenCore yet, set that up first with the OpenCore Install Guide (OpenCore releases), then install the driver. The full write-up of how the driver works is in docs/HOW-IT-WORKS.md.

Support the work: https://buymeacoffee.com/nullmoth

macOS	15 Sequoia (tested 15.7.x and 15.8.1), x86_64
GPUs	NVIDIA Turing and later from the GSP device table; physical validation: RTX 5060
Metal	Metal 3: argument buffers tier 2, ray tracing, mesh shaders, MPS, MetalFX path
Also	OpenGL (through Apple's GL-on-Metal), OpenCL, Core Image, Core ML

How it works

Metal app ─► NVMTLDriver.bundle ─► translator (Apple AIR → SPIR-V) ─► NVK (Mesa Vulkan + NAK compiler) ─► kexts ─► GPU

Component	Path on disk	Source
Metal driver plugin	/Library/GPUBundles/NVMTLDriver.bundle	plugin/
Shader translator	inside the plugin (libnvmtl_translate.dylib)	translator/ (LGPL-3.0, based on metal2vulkan)
Vulkan back end (NVK)	/Library/GPUBundles/nvmtl/	nvk/nvk-macos.patch on Mesa 17ca6174
Kernel extensions	/Library/Extensions/NVRM, NVAccel, NVRMFB, NVRMAGDC	kexts/
GPU firmware (GSP)	/Users/Shared/nvfw/nvidia/610.57.04	NVIDIA, unmodified

The kernel side runs NVIDIA's own open GPU kernel modules (r610) under macOS. NVRMFB is the display framebuffer, NVAccel the accelerator WindowServer composites through, NVRMAGDC the display-policy shim.

Install — prebuilt (recommended)

Download nullmoth-nvidia-<version>.tar.gz from Releases, then:

tar -xzf nullmoth-nvidia-*.tar.gz && cd pkgroot
shasum -a 256 -c SHA256SUMS          # every file must say OK
sudo ./install.sh                    # copies the files, rebuilds the Auxiliary Kernel Collection
sudo shutdown -r now                 # a reboot is required: logout does not load the driver

macOS asks you to allow the extensions in System Settings → Privacy & Security the first time. Allow, then reboot again.

1401 Mac app (easiest)

Download the latest 1401-Mac-<version>.dmg from Releases, open it, and run 1401 (the driver package is inside the disk image, so nothing else to download). Follow its steps. A supported setup must use a verified or explicitly selected OpenCore partition. The app finds the OpenCore that started your Mac (in EFI/OC or EFI/BOOT, on an EFI or FAT32 partition), shows every change before making it, backs the config up, installs the driver, and adds 1401: Remove NVIDIA driver to the OpenCore boot picker. Choosing that entry removes the driver at the next start and puts the Mac back exactly as it was before the install, OpenCore config included, then restarts by itself. The app also maps your USB ports and, if the driver ever crashes the Mac, offers to make a crash report you can upload yourself (it never sends anything on its own).

Something not working? Open 1401 > Crash report > Send logs to NullMoth. It sends what 1401 did, the driver's state, driver crash reports, recent WindowServer crash reports and OpenCore's startup logs (names, serial numbers and addresses removed), each with a SHA-256 the site checks, and shows a report ID to quote in the NullMoth Discord.

Keep the USB stick or disk OpenCore started your Mac from plugged in while the app runs: that is the config it changes. A shared SMBIOS model alone does not establish the startup partition. Automatic USB-to-internal copying is disabled, preserving Windows and vendor boot files. Driver installation uses the selected startup partition. Keep the OpenCore stick attached for every restart until the internal boot setup is reviewed. After the install, restart; the first start with the driver pauses for up to a minute at "PCI configuration end" while the GPU comes up.

Wiring into an existing OpenCore setup

The kexts install into /Library/Extensions and load from the Auxiliary Kernel Collection — do not also inject them from EFI/OC/Kexts. OpenCore only needs to set SIP and boot-args.

NVRAM → Add → 7C436110-AB2A-4BBB-A880-FE41995C9F82

Key	Value	Why
csr-active-config	<430A0000> (Data)	the tested value: unsigned kexts, plus what root patches need
boot-args	nvfb=1 nvaccel=1 nvfbheads=4 -nvkmsnosmooth amfi_get_out_of_my_way=0x1 amfi=0x80 ipc_control_port_options=0	framebuffer + accelerator, 4 display heads; the AMFI args let WindowServer load the driver bundle

Optional boot arguments, for troubleshooting:

boot-arg	Effect
-nvrmnoflip	keeps the composited frame on the copy path: NVRM never turns on zero-copy scan-out (debug.nvaccel_iop_flip), so the display reads a finished copy instead of the surface the GPU may still be drawing. Try it first when the desktop flashes or tears while the cursor moves.
-nvrmnogo	the driver idles until nvrmctl go <pass> instead of starting the GPU itself.
-nvrmnobootscreen	do not snapshot the boot screen.

Add every key you set to NVRAM → Delete as well, so the values are rewritten each boot.

Setting	Value	Why
UEFI → Quirks → ResizeGpuBars	13	8 GB BAR: full memory bandwidth (tested on the RTX 5060)
Booter → Quirks → ResizeAppleGpuBars	-1	macOS sees the full BAR
Kernel → Block	com.apple.iokit.IONDRVSupport, Strategy Exclude	otherwise the firmware framebuffer takes display index 0 from NVRMFB
Misc → Security → SecureBootModel	Disabled	Apple Secure Boot refuses kexts Apple did not sign

The macOS installer needs the opposite BAR settings (ResizeAppleGpuBars 0, ResizeGpuBars -1, IONDRVSupport not excluded): it has no NVIDIA driver and runs on the firmware's screen. 1401 builds installers that way, and the 1401 Mac app switches to the values above when it installs the driver.

Also required:

• BIOS: Above 4G Decoding ON (the card maps memory above 4 GB), CSM OFF.
• SMBIOS: a Mac model that runs macOS 15 with a discrete GPU (tested: iMacPro1,1, which 1401 uses).
• Remove any nv_disable=1, WhateverGreen NVIDIA patches, or agdpmod=pikera for this card.
• No DeviceProperties are needed for the NVIDIA card.

Verify after the reboot:

kmutil showloaded --list-only | grep nullmoth      # 4 lines
system_profiler SPDisplaysDataType | head -20      # your GeForce, Metal: supported

Dual boot

Nothing in the driver touches other disks. OpenCore's picker boots Windows (ScanPolicy 0 or including NTFS) and Linux (OpenLinuxBoot.efi in UEFI → Drivers, LauncherOption = Full) alongside macOS.

Uninstall

sudo ./uninstall.sh && sudo shutdown -r now

Build from source

Requires Xcode 16, Rust (stable), Meson/Ninja, and NVIDIA's open-gpu-kernel-modules at tag 610.57.04.

build/build_xlate.sh       # translator  -> libnvmtl_translate.dylib
RELEASE=1 build/build_plugin.sh   # plugin -> NVMTLDriver.bundle (RELEASE=1 strips every diagnostic)
build/build263.sh          # NVK: apply nvk/nvk-macos.patch to Mesa 17ca6174 first
build/accel_build.sh <src> <out>  # kexts
build/accel_build_all.sh kexts/NVRM <out>  # NVAccel for macOS 15 and 26 (NM_TAHOE=1) -> <out>/{15,26}

Rebuild both accelerators whenever nvrm_vram_abi.h or nvrm_gpuva_abi.h changes: an accelerator built against an older ABI loads, but NVRMFB refuses all its VRAM requests and the desktop stays black.

License

Free of charge, source code included. Nobody may sell it or use it to make money.

• plugin/, kexts/, build/, package/: PolyForm Noncommercial 1.0.0 (see LICENSE), © NullMoth Systems. Personal, research, educational and non-profit use is allowed; any commercial use is not.
• translator/: LGPL-3.0-or-later (see translator/LICENSE): it is based on metal2vulkan, whose licence carries over.
• nvk/: changes to Mesa (MIT).
• GSP firmware: NVIDIA's redistributable firmware licence.

See NOTICE for third-party credits.