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Apple 101

  • If you get an “authentication failed” message when dialing your ISP

    If you receive an “authentication failed” message when you try to connect to the Internet using a dial-up account to your ISP, your user name or password may be entered incorrectly in Network preferen...

  • Get information about a disk

    You can use Disk Utility to see detailed information about a disk, such as its format, its capacity and available space, and the number of folders and files on it. In Disk Utility, select the disk in ...

  • Get help using Back to My Mac

    Check your settings and connections On all of your computers: Make sure you're signed in to iCloud with your current Apple ID. If you changed your password but didn't update it in iCloud preferences o...

  • Get information about a certificate using Keychain Access

    Use Keychain Access to view the information contained in a certificate. Select a certificate in the Category list. For more detailed information about the certificate, click the Info button (i) at the...

  • Get help with FaceTime on your Mac

    If you aren’t able to use your camera or mic, can’t sign in, or can’t stay connected, learn what to do. Follow steps based on the issue that you need help with. If you can't sign in to FaceTime* Make ...

  • Get help with the Photos app on your Mac

    If Photos for macOS isn't starting up or performing as expected, try these tips. Back up your library Before following any of these steps, it's a good idea to create a backup of your photo library, ev...

  • Start up your MacBook Pro or MacBook by opening it or plugging it in

    MacBook Pro models from 2016 and later and MacBook (Retina, 12-inch, 2017) start up when you open their lids or connect them to power. Learn more about these features. If your MacBook Pro (2016 and la...

  • Start up in safe mode

    Starting up in safe mode may help you diagnose problems you’re having with your Mac. Note: To print these instructions before you start, click the Share button  in the Help window, then choose Print. ...

  • Start up your Mac in single-user mode or verbose mode

    If you're an advanced user who is comfortable with UNIX, you can use single-user mode or verbose mode to help isolate issues related to startup. Hold down one of these key combinations on your keyboar...

  • If a flashing question mark appears when you start your Mac

    If you see a flashing question mark on your Mac's screen at startup, it means your Mac can't find its system software. If the question mark appears for only a few seconds If your Mac displays a flashi...