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Unable to install macos

I'm use MacBook Pro 15. 2019. Unable to install macOS ?

install from wifi Using Command+R

Cannot this photo

Posted on Sep 25, 2020 4:58 AM

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Question marked as Top-ranking reply

Posted on Sep 25, 2020 6:44 AM

Please refer to If your Mac doesn't start up all the way - Apple Support.


Excerpt:


"A globe with an 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 can't start up from macOS Recovery."

3 replies

Sep 25, 2020 9:53 AM in response to zumoro

In Internet Recovery, these low negative thousands error messages indicate that your provided Wi-Fi Network is inadequate in some fashion, and cannot be used (for this purpose) in its current state.


Common problems include:

Hidden Network-name

required use of a proxy server to get Internet access

required use of a login page to get Internet access

Use of a login server or certificate to get Internet access

Use of PPPoE in the Mac to get Internet access (typically only applies to DSL)

Use of Fixed IP address rather than good old DHCP

Variance of the time by more than five minutes

Failure of Router to provide workable DNS server addresses, or providing 0.0.0.0 [may produce -2002f]


If you have an Ethernet port, you may in some cases be able to move your Mac close to the Router and connect to the Router using Ethernet.


The higher the number, the more obscure the problem.


Also, make certain the Date&Time and Time Zone are correct within 5 minutes.

Unable to install macos

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