How to Get Into the MacBook BIOS

Techwalla may earn compensation through affiliate links in this story. Learn more about our affiliate and product review process here.
BIOS is accessible outside the operating system.

A system's BIOS, or Basic Input/Output System, is a software chip in a computer's motherboard that determines how the operating system functions. All Windows operating systems use BIOS, while MacBook computers use an equivalent called EFI, or Extensible Firmware Interface. EFI serves the same purpose as BIOS, where advanced users can configure specific system-level settings. Proceed with caution when accessing this utility, since an error in configuration could jeopardize the stability or functionality on your system.

Advertisement

Step 1

Shut down your MacBook.

Advertisement

Video of the Day

Step 2

Turn MacBook on
Image Credit: Justin Sullivan/Getty Images News/Getty Images

Power on your MacBook after it has completely turned off.

Advertisement

Step 3

Press the "Command-Option-O-F" key combination
Image Credit: David Paul Morris/Getty Images News/Getty Images

Press "Command," "Option" and the letters "O" and "F" simultaneously before the system starts up.

Advertisement

Advertisement

Step 4

Keep keys held
Image Credit: Jupiterimages/Photos.com/Getty Images

Hold the keys until a prompt screen launches. You have accessed the MacBook's BIOS equivalent.

Video of the Day

Advertisement

Advertisement

references