Apple released the MacBook Pro 15" Unibody with a new aluminum upper case machined from a single aluminum block.

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hard drive not detect


i have an macbook pro 15" when i power on it for 3 second display is black and hard drive led flash 5 times then macbook pro power on but not recognize hard drive

i replace hard drive and so i replace hard drive data cable but problem not fix please help me

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Can you give us the last four digits of your serial number so we can identify which model you have.



thanks for your answer

Model is A1226


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To start with here's a good writeup on the boot up process and the error conditions, Apple TN: Intel-based Mac: Startup sequence and error codes, symbols.

From what it sounds like your RAM is bad or not correctly seated in the slots. Try removing one of the memory modules one at a time to see if that makes a difference.

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thank you for answer but there is no beep sound only 5 times flash h.d.d led and macbook turn on but hard drive not detect


OK, thats not good ;-{ I was hoping your description was off. Here's the other Apple TN on just the five flashes: OS X Mavericks: If the sleep indicator light flashes.


Your logic board has a problem, SMC services controls the Sleep LED and has lost communication with your CPU's controller logic.


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