Released June 2012 / Core i7 processor with Turbo Boost / Up to 1 GB DDR5 Video RAM

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Why SSD's is not working?

Hello everyone, I got MacBook Pro 9,1 and I want to upgrade it from HDD to SSD.

I tried Samsung EVO 850 - No luck, only working through USB

Now I got OCZ TR150 - Same problem

But HDD is working fine! I heard about problems wit SMC and BootROM versions, mine is the last versions Boot ROM:MBP91.00D3.B0D / SMC: 2.1f175

Some people in the web tells that changing the sata cable will do the magic, but what the difference between stock sata cable and the other one? (From iFixit)

Sorry 4 my English lol, I'm Russian

Update (10/25/2016)

Non-workin cable inside

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Well to start off your English is better than my Russian ;-}

Yes, you need a new HD SATA cable. While your HD is able to use the current cable your new SSD just can't. It all comes down to speed!

The Apple drive you currently have is a SATA II (3.0 Gb/s) drive, your new Samsung SSD drive is SATA III (6.0 Gb/s). The SATA cable your system came with is only rated for SATA II which is why you need to replace it. Unlike desktop systems laptop cables are finicky!

You need to use the newest version of the cable: MacBook Pro 15" Unibody (Mid 2012) Hard Drive Cable - Apple P/N 923-0084


MacBook Pro 15" Unibody (Mid 2012) Hard Drive Cable Image


MacBook Pro 15" Unibody (Mid 2012) Hard Drive Cable


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Thanks Dan! That means I need to find a part with 923-0084 number, right? (I just want to try find it in the local stores in Russia)


it woud be nice if u tell me what digits gotta be on the cable exactly, thx


Numbers & Numbers!

Apple P/N's are different than the manufacture number. You should go by the Apple P/N number. For reference: Hard Drive Data Cable for the MacBook Pro 15" Unibody - 923-0084. The 923-0084-01 is the newer (better) version manufactures number.


Much love from Russia, Dan! Your support is helped me alot! :)


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