Thunderbolt, USB, or FireWire symbolĪ large Thunderbolt, USB, or FireWire symbol against a dark background means that your Mac is in target disk mode. 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 what to do if you forgot your login password. You might see a default desktop picture in the background, which might change to your chosen desktop picture when you select your account. If FileVault is turned on, this also unlocks your disk. Under 'Actions' 'Shut Down' does not shut down, so have to use 'Stop'. Every attempt to launch Windows 10 shows 'Windows 10 starting.' briefly, then a black screen with no cursor. Login windowĪt the login window, enter your user account password to log in to your Mac. Under Mac OS X El Capitan 10.11.6 on a MacBook Pro Retina 15' Late 2013, upgraded to Parallels version 12 pro. Enter the four-digit or six-digit passcode to continue. Your Mac asks for a PIN code when it has been remotely locked using Find My because the owner thinks the Mac is lost or stolen. 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. Learn what to do if your Mac starts up to an exclamation point in a circle. This unusual event is technically called a Black Screen of Death. Learn what to do if your Mac starts up to Options with a gear icon, also known as startup options. If your Mac doesn’t start up to the login window and instead shows a black screen, you need to thoroughly troubleshoot your computer. 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. Learn what to do if your Mac can't start up from macOS Recovery. Globe with warning symbolĪ 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 starts up to a circle with a line through it (prohibitory symbol). ![]() On laptop computers that have Touch ID, press and hold Touch ID. If startup never progresses beyond an Apple logo or progress bar: Press and hold the power button on your Mac for up to 10 seconds, until your Mac turns off. Learn what to do if your Mac starts up to a question mark. If your Mac is stuck on this screen or keeps restarting. 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.
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