To use any of these key combinations, press and hold the keys immediately after pressing the power button to turn on your Mac, or after your Mac begins to restart. Keep holding until the described behavior occurs.
- Command (⌘)-R: Start up from the built-in macOS Recovery system. Or use Option-Command-R or Shift-Option-Command-R to start up from macOS Recovery over the Internet. macOS Recovery installs different versions of macOS, depending on the key combination you use while starting up. If your Mac is using a firmware password, you're prompted to enter the password.
- Option (⌥) or Alt: Start up to Startup Manager, which allows you to choose other available startup disks or volumes. If your Mac is using a firmware password, you're prompted to enter the password.
- Option-Command-P-R:Reset NVRAM or PRAM. If your Mac is using a firmware password, it ignores this key combination or starts up from macOS Recovery.
- Shift (⇧): Start up in safe mode. Disabled when using a firmware password.
- D: Start up to the Apple Diagnostics utility. Or use Option-Dto start up to this utility over the Internet. Disabled when using a firmware password.
- N: Start up from a NetBoot server, if your Mac supports network startup volumes. To use the default boot image on the server, hold down Option-N instead. Disabled when using a firmware password.
- Command-S: Start up in single-user mode. Disabled in macOS Mojave or later, or when using a firmware password.
- T: Start up in target disk mode. Disabled when using a firmware password.
- Command-V: Start up in verbose mode. Disabled when using a firmware password.
- Eject (⏏) or F12 or mouse button or trackpad button: Eject removable media, such as an optical disc. Disabled when using a firmware password.
If a key combination doesn't work
HP SpareKey is a utility that helps you, or the administrator of the computer, recover lost system passwords, such as the power-on, drive lock, or BIOS passwords.When setting up the SpareKey, you are prompted to provide answers for a sequence of three predetermined personal identification questions. This device unlocks and removes EFI BIOS passwords of the Apple Mac including MacBook Pro, MacBook Air, iMac, Mac mini, MacBook and Mac Pro (2010 – 2017) within around 15 seconds. The package includes: 1x Unlocker device (EFI BIOS Master) 1x SOIC8 clip with cable. 1x SPI flex cable. 1x User Manual (PDF).
- ROM BIOS or commonly known as BIOS is an integral part of a computer. Whenever we turn on the computer, initially it shows the memory capacity, also suddenly the light of the NUM lock glows, and there is a beep sound at the end, after which we see the familiar Windows Logo.For a computer geek, this is normal behavior that a computer exhibits after it is turned on, however the same cannot be.
- The first method to remove the BIOS password on a HP (or other brand) laptop or Desktop computer, is to locate and remove the CMOS battery for a few minutes. To accomplish this task: 1. Find out he location of the CMOS/Battery, by performing a simple search on the web about how to replace the CMOS battery on your laptop, computer or motherboard.
If a key combination doesn't work at startup, one of these these solutions might help:
Bios Password For Acer Laptop
- Be sure to press and hold all keys in the combination together, not one at a time.
- Shut down your Mac. Then press the power button to turn on your Mac. Then press and hold the keys as your Mac starts up.
- Wait a few seconds before pressing the keys, to give your Mac more time to recognize the keyboard as it starts up. Some keyboards have a light that flashes briefly at startup, indicating that the keyboard is recognized and ready for use.
- If you're using a wireless keyboard, plug it into your Mac, if possible. Or use your built-in keyboard or a wired keyboard. If you're using a keyboard made for a PC, such as a keyboard with a Windows logo, try a keyboard made for Mac.
- If you're using Boot Camp to start up from Microsoft Windows, set Startup Disk preferences to start up from macOS instead. Then shut down or restart and try again.
Remember that some key combinations are disabled when your Mac is using a firmware password.
Bios Password Macbook Pro
Learn more
Password Programs For Mac
- Learn what to do if your Mac doesn't turn on.
- Learn about Mac keyboard shortcuts that you can use after your Mac has started up.