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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).
Oct 16, 2017 After installing Sierra with great success after your guide. Would I like to try to install high sierra on the same computer. But I get right after the clover, during installation boot a very strange sign: circle with slash. Feb 16, 2018 There are a lot of reports from users that Apple computers with macOS High Sierra freeze or crashes and do not react to any user’s actions. Some claim that the keyboard doesn’t work and the cursor doesn’t move while the music continues to play.
Learn what to do if your Mac starts up to a question mark.
Options with a gear icon
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Learn what to do if your Mac starts up to Options with a gear icon.
- Nov 19, 2020 The first thing to try if your Mac is unresponsive is checking if an app has frozen, as sometimes this can also lock up your Mac. If an app has frozen and quitting it won’t work, Ctrl+click its.
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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.
Learn what to do if your Mac starts up to an Apple logo or progress bar.
Globe with alert symbol
A globe with an 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.
Amharic fidel test. 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.
System lock PIN code
Your Mac asks for a PIN code when it has been remotely locked using Find My. Enter the four-digit or six-digit passcode 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.
Thunderbolt, USB, or FireWire symbol
A large Thunderbolt , USB , or FireWire symbol against a dark background means that your Mac is in target disk mode.
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- Learn what to do if your Mac displays a message that it restarted because of a problem.
- When starting up from Windows using Boot Camp, your Mac doesn't show an Apple logo or the other macOS screens in this article.