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What is Mac EFI?
Extensible Firmware Interface (EFI) is the firmware-based replacement for the PC BIOS from Intel. Designed by Intel, it was chosen by Apple to replace Open Firmware, used on PowerPC architectures. It is a part of the Extensible Firmware Interface (EFI) standard proposed by Intel as a substitute for the earlier PC BIOS.
How do I check the health of my Mac computer?
Start Apple Diagnostics
- Turn on your Mac and continue to press and hold the power button as your Mac starts up.
- Release when you see the startup options window, which includes a gear icon labeled Options.
- Press Command (⌘)-D on your keyboard.
How do I get EFI on my Mac?
Like the BIOS, the EFI has its own interface or “shell” that allows you to change hardware settings. Apple does not include this shell in its Macintosh computers. Despite misconceptions about different types of Mac firmware, there is no way to access the EFI directly.
What to do if your Mac doesn’t pass startup verification?
If the OS doesn’t pass verification: macOS: An alert informs you that a software update is required to use this startup disk. Click Update to open the macOS installer, which you can use to reinstall macOS on the startup disk. Or click Startup Disk and choose a different startup disk, which your Mac will also attempt to verify.
Which is the default security setting on a Mac?
Full Security is the default setting, offering the highest level of security. This is a level of security previously available only on iOS devices. During startup, your Mac verifies the integrity of the operating system (OS) on your startup disk to make sure that it’s legitimate.
What to do if FileVault is enabled on a Mac?
If FileVault is enabled while your Mac is attempting to download updated integrity information, you’re asked to enter a password to unlock the disk. Enter your administrator password, then click Unlock to complete the download. If the OS doesn’t pass verification: