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How to tell which m.2 SSDs will work with my Mid 2015 MBP?

I have found several that are significantly cheaper than anything Apple would offer, and considering the simplicity of the matter (in regards to replacement), I'd rather choose my own and install it myself. After all, I'm an IT Consultant by day and have worked on computers for over a decade.

Additionally, I see that the 1TB that is marked as compatible with my device on this website is roughly $200 more than the 1TB SSDs I have found in other areas, namely Amazon, such as, but not limited to: Sabrent, Western Digital, Crucial, PNY.

So, how do I know which ones will be fully compatible with my Mid 2015, 15” MBP Retina? And, do I need to worry about future software updates from Apple preventing these SSDs from working properly?

Also, if one could tell me how to know if these drives would work with the Early 2013 MBP Retina 15”, as well as how to identify which won't work and will work for future models, I would greatly appreciate it.

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Sadly, you can’t use a M.2 SSD in a Mac straight up! Apple uses a custom drive which limits you to either another Apple SSD, or a third party like OWC Aura drives or Transcend Jet Drive 855

Here’s a good reference The Ultimate Guide to Apple’s Proprietary SSDs

While there are cheater adapters which will allow you to fit in a M.2 SSD into a Mac its a gamble!

Now you need to depend on the vendors who’s produce the precasts to have validated things. Different adapters work better with given SSD’s. So its important to see what they support. Ask your self are they likely to be around for the long run if you need support later on?

Sadly, I’ve taken out quite a few of these setups while they appear to work at the start the amount of data churn and fullness tends to make them less reliable.

So if you are someone dependent on your Mac and work it hard I would stay clear of these. If you a light weight user simple web browsing and writing then maybe its worth the give and take.

I personally don’t recommend them.

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Thank you, very thorough and helpful response. I will have to check out that guide soon.

The only part I didn't fully understand was when you mention 'the amount of data churn and fullness tends to make this less reliable'. In what what are they less reliable, and what is 'data churn' exactly?

Thanks!

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Wikipedia offers a good definition: Churn Rate

Here we are talking about the a given set of cells within the SSD which are erased and then written to over and over again. SSD makers have added services within the SSD to make this less of an issue but the OS needs to allow these actions to happen. TRIM and Wear Leveling which are part of the garbage collection services which run into trouble. As well as bad block management using spare cells to replace damaged ones.

Unlike a HDD which you can do erase and rewrite over and over again SSD breakdown over time as they have a limited number reuse cycles.

In normal use you are not likely to see a problem, but using a bad adapter can create excessive CRC errors which forces excessive cycles wearing out prematurely the given SSD.

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