Under Format: select Mac OS Extended (Journaled) Select the USB disk in the left pane (select the physical disk, not a volume on the disk) Open Applications → Utilities → Disk Utility Peripherals → Super IO Configuration → Super IO Chip → Serial Port A = Disabledĭownload the Install macOS High Sierra app from the App Store.Peripherals → SATA Mode Selection = AHCI.BIOS Features → Boot Mode Selection = UEFI Only.BIOS Features → Intel Virtualization Technology = Disabled.*Set to Disabled if your RAM modules do not support Intel XMP → Advanced Memory Settings → Extreme Memory Profile (X.M.P.) = Profile1* → Advanced Frequency Settings → Advanced CPU Core Features → CPU EIST Function = Disabled Press F12 at startup to enter BIOS setup and select the following: See the modified BIOS here if you want to use an NVMe SSD
See the guide here if you are updating from a legacy version of the BIOS (version F12 or earlier) Update the BIOS to the latest UEFI version MacOS HIGH SIERRA 10.13.6 INSTALLATION on the GA-Z68X-UD3H-B3įollow these steps to perform a clean installation of macOS 10.13 High Sierra on your GA-Z68X-UD3H-B3 system.