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I install the Kingston ssd A400 480 gb to my MacBook Pro mid 2012 and it runs fine with Catalina but the Blackmagic speed test app tells me that it goes at 280 mbps like it was SATA ll but this Mac is compatible with SATA lll already activated TRIM but it goes the same, what should I do?
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Did you change the HD cable and the drive, or just the drive? The cables in these vary wildly; some have the “thin” SATA II cable, while others have the thick SATA II or SATA III cable. As a general rule with these, throw the cable out and swap it with the SATA III revision to avoid these issues at the time of the SSD purchase. If you buy one used do it when you do other maintenance items like dust and thermal paste so you can say it's “done” and then buy the drive when you're ready and just install it. You’re going to want to with how cheap a good SSD is now and how miserable the original drives are.
The exception to this rule is when the seller can prove they did it, but most of them don’t get it out of the way before they sell it unless it’s a machine they personally used and know about the problem. Think of it like this: if you know something is a ticking time bomb, do you wait until it blows and becomes a problem later, or fix it ahead of time? You would want to address it before it becomes a problem.
Refer to this guide to change it.
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I just changed just the drive, but I think that there are no SATA 2 or SATA 3 cables all should work depending on the chipset you have, am I wrong?
@sebasg Yeah no - there's 3. The original thin cables always have issues and the thick SATA II is known to be a problem child as well. The SATA III cable is only found on later production models (most do not have it), so most fall under the SATA II cable group. Replacement is not an option - just get it over with yourself if you have any doubts.
I would do this ASAP if I got a 13" 2012 just so I know I have the correct cable, even with documents to prove it's been fixed. I would rather be sure and spend the money now, rather then hope it's the right one.
thanks man should i buy it from here? or where
Here's the needed part MacBook Pro 13" Unibody (Mid 2012) Hard Drive Cable
@danj I'm surprised this issue isn't as known as it should be - it's so likely to happen you're better off swapping the cable when you get the computer so you know it's fixed.
I would rather address it while I have the original spinner so when I'm ready to put an SSD in it's already resolved. If you wait, this always happens.
It's something you can ignore... until you decide to get rid of the original drive and regret waiting to address it.
I have never faced any issues maybe because I got it from BuyKingston. It's working pretty well for me. Where did you buy it?
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