If your Mac doesn't start up all the way
If your Mac doesn't start up all the way or needs you to do something during startup, it might stop at one of these screens.
Learn what to do if your Mac starts up to a question mark.
Circle with a line through it
Learn what to do if your Mac starts up to a circle with a line through it (prohibitory symbol).
Globe with warning symbol
A globe with a warning symbol (exclamation point) means that your Mac tried to start up from macOS Recovery over the internet, but couldn't. Learn what to do if your Mac can't start up from macOS Recovery.
Learn what to do if your Mac starts up to an Apple logo or progress bar.
Blank (empty) screen
Learn what to do if your Mac starts up to a blank screen, such as an empty gray, black, or blue screen.
Options with a gear icon
Learn what to do if your Mac starts up to Options with a gear icon, also known as startup options.
Exclamation point in a circle
Learn what to do if your Mac starts up to an exclamation point in a circle.
If your Mac is using a firmware password, the lock icon appears when you try to start up from another disk or volume, such as an external drive or macOS Recovery. Enter the firmware password to continue.
At the login window, enter your user account password to log in to your Mac. If FileVault is turned on, this also unlocks your disk. You might see a default desktop picture in the background, which might change to your chosen desktop picture when you select your account.
The login window appears only after you log out of your user account (Apple menu > Log Out) or restart or start up your Mac. If you're still logged in to your user account, you might see your lock screen instead. Your lock screen looks similar and uses the same login password, but doesn't provide password-reset options.
Learn what to do if you forgot your login password.
Activation Lock or system lock PIN code
If your previously owned Mac shows an Activation Lock window that asks for someone else's Apple ID, the previous owner may need to remove Activation Lock for you. Learn about Activation Lock on Mac.
Your Mac might ask for a PIN code when it has been remotely locked using Find My because the owner thinks the Mac is lost or stolen. Enter the four-digit or six-digit passcode to continue.
Thunderbolt, USB, or FireWire symbol
A large Thunderbolt target disk mode., USB , or FireWire symbol against a dark background means that your Mac is in