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All Mac Boot keys combinations. Comprehensive 5 minute tutorial. For iMac retina, I have to plug the windows keyboard to the outer usb port and then press alt key on the left side to boot into the boot menu and see things like bootable usb drive. Share Improve this answer. If you’re using a Mac notebook computer with an external keyboard, make sure you press and hold the Option key on the built-in keyboard. Restart using Boot Camp Control Panel: Click in the right side of the taskbar, click the Boot Camp icon, then choose Restart in macOS. This also sets the default operating system to macOS. Double-click or press the Return key to start up your Mac from the volume you selected. If you have an optical drive connected to your computer, you can insert an installation disc to see it in Startup Manager.

• Imac Boot Menu
• Mac Boot Keystrokes
• How To Get To The Boot Menu
• Macbook Pro Boot Menu

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 behaviour 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 with the Apple Diagnostics utility. Or use Option-Dto start up 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

If a key combination doesn't work at startup, one of these solutions might help:

List of Boot Menu Hot-Keys In this article, you'll find out what keyboard key you'll need to press in order to access your computer's boot menu or BIOS menu. The keys vary from computer to computer, so be sure to check what key works for yours!

Controlling the Post-Startup Environment. Most Macintosh users know about holding the Shift key down to prevent extensions from loading, but there are numerous startup modifiers that affect the state of the system after the boot process finishes. Shift causes the Mac to boot without extensions, which is useful for troubleshooting extension conflicts. Safe mode: shift. Safe mode is a way of starting up your Mac that makes sure it performs certain.

• 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 recognise the keyboard as it starts up. Some keyboards have a light that flashes briefly at startup, indicating that the keyboard is recognised 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.

Learn more

Boot Keys Macbook

How To Boot From USB On Mac, Windows Or Linux

• Find out what to do if your Mac doesn't turn on.
• Find out about Mac keyboard shortcuts that you can use after your Mac has started up.

This document is an overview of the keys that allow you to boot to a system BIOS and boot menu on various systems.

Imac Boot Menu

Mac Boot Keystrokes

How To Get To The Boot Menu

Macbook Pro Boot Menu