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UEFI Configuration

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Alex James edited this page Mar 28, 2017 · 13 revisions

Before installing OS X, you should properly configure your UEFI BIOS to ensure maximum compatibility with OS X. It is also recommended that you update to the recommended UEFI BIOS version (linked in the home page of the wiki) for your motherboard. The modded UEFI images have updated EFI drivers & OROMs, as well as an additional FireWire driver to prevent "Invalid GUID" console spam in OS X when the CSM is disabled. Flash them with Q-Flash.

First, go over to the Save & Exit tab and Load Optimized Defaults. UEFI 1

After loading Optimized Defaults, go to M.I.T.\Advanced Frequency Settings and set CPU/PCIe Base Clock to 100.05, and if your RAM supports it, the proper Extreme Memory Profile (X.M.P.). UEFI 2

Then go to Advanced CPU Core Features and set the CPU Clock Ratio and the Turbo Ratios. If you are not overclocking, just set them to the default values, but don't set them to auto. This is needed for proper power management. Make sure Internal CPU PLL Overvoltage is set to Disabled as well. UEFI 3

Go to BIOS Features and set Windows 8 Features to Windows 8 and make sure Secure Boot is set to Disabled. If your GPU supports UEFI GOP and you don't have any legacy OSes, you can disable the CSM (compatibility support module). UEFI 4

Under Peripherals, set Internal Graphics to Enabled (not auto). Also verify that the SATA Mode is set to AHCI. UEFI 5

Save the changes to the UEFI configuration and exit. UEFI 6

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