You can make a difference in the Apple Support Community!

When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

User profile for user: Hewokai
Hewokai Author
User level: Level 1
40 points

how do i fix error -2100F

MacBook Air Early 2015 11"

Starting up computer with a flashing folder with the ? Sign on it. I've turned it off and turned on again but using CMD + R. Turns on again with a spinning globe saying"internet recovery this may take a while." Waiting for about 10 minutes before iit is a still globe with a caution sign. At the bottom it says apple.com/support -2100F.

Now when I restart MBA again it just restarts the internet recovery , sometimes it has a time at the bottom (now it says 2:34)

What can I do to fix it? It was perfectly fine before I turned it on. The only thing that could be related is an iOS update that I've post poned for a whild now. What do I do?!

Posted on May 22, 2018 3:35 AM

Reply
Question marked as Top-ranking reply
User profile for user: sterling r
sterling r
User level: Community Specialist

Posted on May 22, 2018 5:06 PM

Hello Hewokai,

Thank you for using Apple Support Communities! I understand that your MacBook Air is starting up to a folder with a question mark. Having your MacBook Air power on as expected is important, and I would be happy to help.

The folder with a question mark means your Mac couldn't find a local or network-based startup disk. The next step would be to try connecting your MacBook Air to a different Wi-Fi network, then attempting to select your startup disk in macOS Recovery following the steps here:

If a flashing question mark appears when you start your Mac - Apple Support

Specifically, use this section:

If your Mac doesn't start up

If your Mac starts up to a flashing question mark, but then doesn't continue starting up, try these steps.

  1. Turn off your Mac by pressing and holding the power button for a few seconds.
  2. Press the power button once to turn your Mac back on. Immediately press and hold the Command and R keys on your keyboard to start your Mac from macOS Recovery. Keep these two keys held down until you see an Apple logo or globe.
  3. If prompted, select a Wi-Fi network to connect to the Internet as part of startup.
  4. After the macOS Utilities window appears, choose Startup Disk from the Apple menu.
  5. Select your startup disk, then click Restart.

If you don't see your startup disk in the Startup Disk window, close the window and try the next sections of this article.


If you encounter the -2100F error again when connected to a different Wi-Fi network, contact Apple via the link below:

Contact - Official Apple Support

Take care!
View in context

Similar questions

1 reply
Question marked as Top-ranking reply
User profile for user: sterling r
sterling r
User level: Community Specialist

May 22, 2018 5:06 PM in response to Hewokai

Hello Hewokai,

Thank you for using Apple Support Communities! I understand that your MacBook Air is starting up to a folder with a question mark. Having your MacBook Air power on as expected is important, and I would be happy to help.

The folder with a question mark means your Mac couldn't find a local or network-based startup disk. The next step would be to try connecting your MacBook Air to a different Wi-Fi network, then attempting to select your startup disk in macOS Recovery following the steps here:

If a flashing question mark appears when you start your Mac - Apple Support

Specifically, use this section:

If your Mac doesn't start up

If your Mac starts up to a flashing question mark, but then doesn't continue starting up, try these steps.

  1. Turn off your Mac by pressing and holding the power button for a few seconds.
  2. Press the power button once to turn your Mac back on. Immediately press and hold the Command and R keys on your keyboard to start your Mac from macOS Recovery. Keep these two keys held down until you see an Apple logo or globe.
  3. If prompted, select a Wi-Fi network to connect to the Internet as part of startup.
  4. After the macOS Utilities window appears, choose Startup Disk from the Apple menu.
  5. Select your startup disk, then click Restart.

If you don't see your startup disk in the Startup Disk window, close the window and try the next sections of this article.


If you encounter the -2100F error again when connected to a different Wi-Fi network, contact Apple via the link below:

Contact - Official Apple Support

Take care!
Reply

how do i fix error -2100F

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.
Learn more Sign up