Fixes — macOS Sequoia

Verified solutions implemented in this EFI. Shared background: UHD 630.

Panel black at boot (backlight not initialised)

Cause: macOS 15 requires the WhateverGreen Backlight Registers Fix (-igfxblr) to initialise the eDP backlight on Coffee Lake. -igfxblt — which works on Sonoma — does not initialise the panel on 15.

Fix: use -igfxblr in boot-args. Details and measurements: display backlight.

Bluetooth not detected

Cause: with the USB map disabled, the Intel Bluetooth device (on XHCI port HS14) does not enumerate, so IntelBluetoothFirmware never loads and macOS reports a placeholder controller.

Fix: keep UTBMap.kext enabled. During installation the map had to be disabled because the installer drive sat on a port the map pruned (causing "still waiting for root device"); re-enable it after installing. The boot drive must be on a port the map declares.

Touchpad conflict

Cause: the firmware's GPI0 GPIO controller claims the I2C device.

Fix: SSDT-GPI0 plus the GPI0 _STA → XSTA rename — identical to Sonoma.

SATA boot disk not appearing

Cause: the SATA controller (8086:A353) is not natively supported.

Fix: CtlnaAHCIPort.kext — required, or the installer cannot see the SSD.

Backlight device

Fix: SSDT-PNLF plus the PNLF → XNLF rename. Both required for the slider to work.

Audio layout

Fix: inject layout-id = 15 on the HDA device (ALC236). Verified for speakers, headphones and the internal microphone. The microphone needs a high input volume — see the Sonoma microphone setup.