[Brenda]

My iMaC has popped up with a blue/green screen of death. I can’t get out of it. Any suggestions?

[KimKomando]

Hi Brenda,

It’s not good. :/

Let’s run first an Apple Hardware Test.

Follow these steps and let us know what it says.

Shut down your Mac. Turn on your Mac, then immediately press and hold the D key on your keyboard. Keep holding until you see a screen asking you to choose your language.

When Apple Diagnostics knows your language, it displays a progress bar indicating that it’s checking your Mac: Checking your Mac takes 2 or 3 minutes.

[Author]

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