MacOS – 13″ MacBook Pro (Mid-2012) failing to fully boot

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I have a 13" MacBook Pro (Mid 2012) that is failing to fully boot.

What happens once I press the power button:

  • Screen turns on, and the typical boot-up loading screen with the Apple logo appears
  • Once the loading progress bar reaches about halfway, the screen goes black
  • About 10 seconds later, the login screen appears
  • I click on my account, type my password, and press enter

Now this is when the funky stuff begins….

  • The computer does not transition from showing the password box to the loading bar
  • Sections of the screen are now gray & green and slightly jittery

After roughly 2 minutes of spazzing out with along with the odd colors showing up….

  • Screen goes black
  • Fan is still fanning
  • Repeated beeping noise

Annnddd thats when I hold the power button and come to you fellas for some help

I'm looking to diagnose the problem in order to hopefully fix it,
any help/recommendation/advice would be much appreciated.

Thanks

The work-around:

Thinking the graphics card might be the problem, I did the following:

  • Uninstalled macOS
  • Installed Debian without GUI (command-line only)

At the end:

  • Laptop does not freeze anymore
  • Laptop does not beep anymore
  • No more black/green/gray pixels

Best Answer

You can run Apple's built it hardware test, Turn on your Mac, then immediately press and hold the D key on your keyboard. Keep holding the D key until you see the Apple Hardware Test

I feel it could be a graphics card issue because it seems to play up when you get to the login screen where the computer actually requires the use of the graphics card.

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