Your description of the screen sounds like what is shown in the pic in this Apple KBase article -
http://docs.info.apple.com/article.html?artnum=106482
If so, then the firmware password function has been invoked. If you have not yet tried, try clicking the righthand button without entering anything in the password entry box.
Unfortunately, if you can not get past it, and it's real, you will not be able to boot the machine to any disk or volume unless you know the required password. It is a reasonably serious level of security, originally directed toward owners of portable machines.
There is a way that such a password can be disabled. For reasons of security, even if we do know the solution we do not post it in these forums - since these forums are accessible by anyone, even by those who have not registered, posting the solution could help nefarious types gain unauthorized access to machines. To find out how to do it, contact Apple's Tech support, or an AASP (Authorized Apple Service Provider).
Where Is The Option Button On Macbook Pro
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. Apple mac official website. Keep holding until the described behaviour occurs.
When your Mac powers up, it normally uses the system on its internal hard drive unless you change this behavior by choosing System Preferences@@→Startup Disk. You can also change what your Mac does by holding down the following keys or key combinations during startup. Print these boot option keys, because they're particularly helpful to have. Step 6: On those pages you will find a Reactivate button or a Renewal page with a button to show details. Step 7: On the displayed pages, you'll find the one year renewal option. How do i get smart switch on my mac. Complete your renewal for $19.95. Previously, you had to click the mymagicjack (my.magicjack.com) button to reach the login page.
- 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.
- Hold Alt key during booting.
- Before you get started with your new MacBook Pro, there are a number of key settings that you should change. From switching off auto brightness and enabling gestures to adjusting the Dock and much.
If a key combination doesn't work
If a key combination doesn't work at startup, one of these solutions might help: https://torrent-push.mystrikingly.com/blog/virtual-piano-keyboard-download.
- 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.
Power Button On Macbook Pro
Lossless converter for itunes 1 7 0 8. Remember that some key combinations are disabled when your Mac is using a firmware password.
Learn more
Macbook Pro Option Command R
- 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.
