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I have a black screen and a prohibitory sign and then no disk is displayed to reinstall the OS

I have a black screen and a prohibitory sign and then no disk is displayed to reinstall the OS

iMac 27″, OS X 10.11

Posted on Sep 4, 2020 6:12 AM

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1 reply

Sep 4, 2020 6:19 AM in response to clk230t

Hi,

Here is an explanation of what does this sign means.

https://support.apple.com/en-gb/HT210901

There is also a guide how to get back to order with your MacOS.

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I have a black screen and a prohibitory sign and then no disk is displayed to reinstall the OS

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