I have MacBook Pro

15-inch, Early 2011

Processor 2 GHz Intel Core i7

Memory 8 GB 1333 MHz DDR3

Once a week it crashed with beep sound ( 3 times ) beep - beep - beep

Then pixel in the display ever time it crashes is as shown in screenshot The only way to turn off the the laptop is by pressing power button for 8sec.

Crashed Macbook pro

2 Answers 2


There is most probably a problem with your RAM. You can run a full test on the RAM with something like Memtest booted off a CD. See here for Mac instructions.

You may find just one RAM module is corrupt and you just need to replace or remove it. It might also be that the RAM has become unseated, try taking it out and putting it back in again to see if that is the case.

  • 3 beeps always indicate memory issues. Good one SJT.
    – rwzdoorn
    Jul 27, 2016 at 10:58

Looks like I am not alone - http://breakfree.cc/

After going thought this article I finally know what the problem was - Early-2011 MacBook Pro owners report hardware failures & system crashes http://www.macworld.co.uk/news/mac/widespread-2011-macbook-pro-failures-reported-3497935/


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