Dell G3 3579 — BIOS Reference
Settings verified on this laptop (BIOS 1.25.0). Apply these before
installing either macOS version.
Required
| Setting |
Value |
Reason |
| Boot mode |
UEFI |
OpenCore is UEFI-only |
| Secure Boot |
Disabled |
OpenCore is not signed by Microsoft/Apple |
| SATA operation |
AHCI |
macOS needs AHCI, not RAID/RST |
| Fast Boot |
Disabled (recommended) |
ensures USB/EFI enumeration |
Recommended
| Setting |
Value |
Reason |
| VT-d |
Disabled, or use DisableIoMapper |
avoids IOMMU conflicts |
| CFG Lock |
Disabled, or use AppleXcpmCfgLock |
required for CPU power management |
| Legacy Option ROMs |
Disabled |
pure UEFI boot |
| Wake on LAN |
Disabled |
avoids sleep issues |
Notes
- The shipped config enables the
AppleXcpmCfgLock and DisableIoMapper quirks, so
it tolerates CFG Lock / VT-d being enabled. Disabling them in BIOS is cleaner.
- The NVIDIA GPU can be left enabled in BIOS; macOS disables it via
SSDT-Disable_GPU_PEG0. There is no need to change a "discrete graphics" BIOS
option for macOS.
- BIOS version differences can change ACPI layout. If your BIOS is not 1.25.0,
re-verify the ACPI patches (especially
PNLF, GPI0, _OSI) against your DSDT.