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How to get into the macbook bios

Updated March 23, 2017

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, where 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 jeopardise the stability or functionality on your system.

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Shut down your MacBook.

Power on your MacBook after it has completely turned off.

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

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

Warning

Proceed with caution when accessing a MacBook's EFI.

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About the Author

Emilio Alvarez has a Bachelor of Science in computer science from San Diego State University and a minor in music composition from Southwestern College, San Diego. He has been writing since 2002 and has published short stories with Editorial Dunken (Buenos Aires, Argentina), where his work is part of a Spanish anthology: "El libro de talleres."

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