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My macbook Pro is beeping three times when starting up. This has happened before and I know I used keyboard commands to fix it. I cannot remember what they were and cannot find them on a websearch. Help!
MacBook Pro, OS X Mountain Lion (10.8.5)
Three beeps on boot usually means bad or failing RAM. There's no key combination that can solve that problem if, in fact, you do have bad modules.
Download Rember and let it run for a couple of hours to see if it finds any fault with your RAM.
Clinton
fix for three beeps using keyboard
