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Startup screens can vary by Mac model, operating system (macOS), and more. Some screens, such as the prohibitory symbol or question mark, mean that you need to resolve an issue before your Mac can finish starting up. For all Mac models, startup is complete when you see the Finder menu bar, desktop, and Dock.

Prohibitory symbol

A circle with a line or slash through it means that the selected startup disk contains a Mac operating system, but it's not a macOS that your Mac can use. You should reinstall macOS on that disk.

Greys anatomy season 13 free download - Greys Anatomy Trivia, Grey's Anatomy Ringtone, Guess the grey s anatomy, and many more programs. Best Video Software for the Mac How To Run MacOS High. MacOS: How To Fix Grayed Out Folders Or Files On Mac Typically, folders and files are displayed in macOS finder app in regular black font and can be accessed. In some cases, the folders and files are grayed out in macOS finder meaning you cannot move.

Question mark

A folder with a question mark means that the selected startup disk isn't available or doesn't contain a Mac operating system. Learn how to resolve a flashing question mark.

Blank (empty) screen

It's normal for a blank screen to appear once or more during startup. It can be black, gray, blue, or a desktop picture. If an image doesn't appear after a few moments, make sure that your display is turned on, connected, and has its brightness turned up.

Apple logo

Your Mac shows an Apple logo when it finds a local startup disk, which is a startup disk built into your Mac or directly connected to your Mac. If it can't find one, it attempts to use a network startup disk, if available. As startup continues, you should see a progress bar or indicator , with or without the Apple logo. This screen might alternate with a blank screen several times.

If you're updating or reinstalling macOS, this stage can take much longer to complete. The progress bar might move more slowly and pause for longer periods as installation progresses. Learn what to do if your Mac seems to be stuck on this screen during or immediately after installation.

Spinning globe

When using a network startup disk, your Mac shows a spinning globe instead of an Apple logo. A spinning globe also appears when starting up from macOS Recovery over the Internet. As startup continues, you should see a progress bar or indicator , which might alternate with a blank screen several times.

Globe with alert symbol

You might see a globe with an exclamation point when your Mac is unsuccessfully attempting to start up from macOS Recovery over the Internet. Your Mac might not be able to connect to the Internet, or it might be using a network configuration that doesn't work with macOS Recovery. Try these solutions:

  • Use Command-R at startup to attempt to use the built-in macOS Recovery system instead of macOS Recovery over the Internet.
  • Connect to the Internet using Ethernet instead of Wi-Fi, or vice versa.
  • Connect to the Internet from a different network.
  • Try again later, because the issue might be temporary.

Lock icon

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.

Login window

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 onscreen means that your Mac is in target disk mode.

Learn more

  • Learn what to do if your Mac doesn't turn on or finish starting up.
  • Learn about Mac startup sounds and POST RAM error codes.
  • When starting up from Windows using Boot Camp, your Mac doesn't show an Apple logo or the other screens in this article.

Take each of these steps that you haven't already tried. Stop when the problem is resolved.

The first step in dealing with a boot failure is to secure your data. If you want to preserve the contents of the startup drive, and you don't already have at least one current backup, you must try to back up now, before you do anything else. It may or may not be possible. If you don't care about the data that has changed since your last backup, you can skip this step.


There are several ways to back up a Mac that is unable to boot. You need an external hard drive to hold the backup data.

a. Boot into Recovery by holding down the key combination command-R at the startup chime, or from a local Time Machine backup volume (option key at startup.) Release the keys when you see a gray screen with a spinning dial. When the OS X Utilities screen appears, launch Disk Utility and follow the instructions in the support article linked below, under “Instructions for backing up to an external hard disk via Disk Utility.”

b. If you have access to a working Mac, and both it and the non-working Mac have FireWire or Thunderbolt ports, boot the non-working Mac in target disk mode by holding down the key combination command-T at the startup chime. Connect the two Macs with a FireWire or Thunderbolt cable. The internal drive of the machine running in target mode will mount as an external drive on the other machine. Copy the data to another drive. This technique won't work with USB, Ethernet, Wi-Fi, or Bluetooth.

c. If the internal drive of the non-working Mac is user-replaceable, remove it and mount it in an external enclosure or drive dock. Use another Mac to copy the data.

Step 2

Press and hold the power button until the power shuts off. Disconnect all wired peripherals except those needed to boot, and remove all aftermarket expansion cards. Use a different keyboard and/or mouse, if those devices are wired. If you can boot now, one of the devices you disconnected, or a combination of them, is causing the problem. Finding out which one is a process of elimination.

If you've booted from an external storage device, make sure that your internal boot volume is selected in the Startup Disk pane of System Preferences.

Step 3


Boot in safe mode.* The instructions provided by Apple are as follows:


  • Shut down your computer, wait 30 seconds, and then hold down the shift key while pressing the power button.
  • When you see the gray Apple logo, release the shift key.
  • If you are prompted to log in, type your password, and then hold down the shift key again as you click Log in.


Safe mode is much slower to boot and run than normal, and some things won’t work at all, including wireless networking on certain Macs.


The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.


*Note: If FileVault is enabled, or if a firmware password is set, or if the boot volume is a software RAID, you can’t boot in safe mode. Post for further instructions.

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When you boot in safe mode, it's normal to see a dark gray progress bar on a light gray background. If the progress bar gets stuck for more than a few minutes, or if the system shuts down automatically while the progress bar is displayed, your boot volume is damaged and the drive is probably malfunctioning. In that case, go to step 5.


If you can boot and log in now, empty the Trash, and then open the Finder Info window on your boot volume ('Macintosh HD,' unless you gave it a different name.) Check that you have at least 9 GB of available space, as shown in the window. If you don't, copy as many files as necessary to another volume (not another folder on the same volume) and delete the originals. Deletion isn't complete until you empty the Trash again. Do this until the available space is more than 9 GB. Then reboot as usual (i.e., not in safe mode.)


If the boot process hangs again, the problem is likely caused by a third-party system modification that you installed. Post for further instructions.


Step 4


Sometimes a boot failure can be resolved by resetting the NVRAM.


Step 5


Launch Disk Utility in Recovery mode (see step 1.) Select your startup volume, then run Repair Disk. If any problems are found, repeat until clear. If Disk Utility reports that the volume can't be repaired, the drive has malfunctioned and should be replaced. You might choose to tolerate one such malfunction in the life of the drive. In that case, erase the volume and restore from a backup. If the same thing ever happens again, replace the drive immediately.


This is one of the rare situations in which you should also run Repair Permissions, ignoring the false warnings it may produce. Look for the line 'Permissions repair complete' at the end of the output. Then reboot as usual.


Step 6


Boot into Recovery again. When the OS X Utilities screen appears, follow the prompts to reinstall the OS. If your Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade.


Note: You need an always-on Ethernet or Wi-Fi connection to the Internet to use Recovery. It won’t work with USB or PPPoE modems, or with proxy servers, or with networks that require a certificate for authentication.


Step 7


Repeat step 6, but this time erase the boot volume in Disk Utility before installing. The system should automatically reboot into the Setup Assistant. Follow the prompts to transfer your data from a backup.


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Step 8

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If you get this far, you're probably dealing with a hardware fault. Make a 'Genius' appointment at an Apple Store to have the machine tested.

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Feb 4, 2013 12:35 PM