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Ali625 Author

Level 1

4 points

Problem in internet recovery mode

Need help!

I started my Mac on Internet Recovery mode and after the internet connection and all it starts downloading/ installing the OS but gets stuck midway and shows this msg with an error sign:

"apple.com/support

-2100F"

What to do?

MacBook Air 11", macOS 10.12

Posted on May 17, 2019 6:00 PM

Top-ranking reply

Tesserax

Level 10

152,103 points

Posted on May 17, 2019 7:07 PM

In Internet Recovery mode a low negative error number typically indicates that the connected Wi-Fi network is inadequate in some fashion, and cannot be used in its current state. If available, you may need to switch to using an Ethernet connection to continue.

If any of the following are true about your network connection, you will not be able to reinstall macOS using Internet Recovery Mode:

The wireless network is configured to use a hidden (non-broadcast) network name or SSID.
The wireless network is secured with either WEP or WPA-Enterprise.
The connection requires certificate-based authentication / 802.1x
The connection requires the use of Proxies (where specific proxy servers must be configured in network preferences)
Captive Wi-Fi networks (where you click an “Agree” button to access the Internet)
PPPoE (where there is no router handling the PPPoE connection)
Failure of the router to provide a workable DNS server address, or providing 0.0.0.0. This typically is seen with a -2002f or -2003f error message.
OS X Internet Recovery Error 2003F (10.11.6) - ASC

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