Recovering files from SSD of MacBook Pro that won’t boot due to water damage Before you start lecturing me on making backups, I'm happy no announce that 90% of my data is backed up. I did exclude some non-essential folders because my internet is garbage. Losing these are an inconvenience at most.

I have not opened my MacBook yet, still looking at what my options are before I start something I will regret. I simply want to connect the old SSD to a new MacBook once to copy some files. I have no interest in keeping the SSD after that. 

I'm a bit lost because browsing google is mainly providing me with recovery services (a bit overkill? SSD should be intact) and products intended for converting the SSD into some kind of permanent external drive, but I'm only interested in a single copy. Fancy casings are not needed. 
It has also come to my attention that regular SSD adapters might not work because apple used a proprietary design. Is this true?

I don't have the old MacBook with me so I'm not 100% sure what model it is. I think it's a 2015 MacBook Pro (no touch bar). What type of connector do I need?

I'm sorry if this is a bit vague. Thank you in advance.
The easy operation is to Use target disk mode to present your Mac as a pure storage device and connect it to another computer. Many broken Macs still work to this extent and since you didn't mention how it was broken, it's quick and easy if power and the storage controller work minimally.


https://support.apple.com/en-us/HT201462


From there, you can copy / image / perform repairs using Disk Utility or other third party data recovery / disk repair / disk imaging.

The article above shows what connectors are supported and you'll be using some flavor of ThunderBolt on a MacBook Pro. For target access - you can use any of the TB3 to TB2 adapters as they work bidirectionally. Same with USB-C to USB-A - the adapters generally work as long as you can make a physical connection.

Liquid damage is tricky and can break all sorts of things:


Need advice: should I open the back of a 2013 Retina MacBook Pro as a means to recover data?


If you are intent on opening the case, the best I can offer is go to iFixit.com or a shop that sells mounting adapters / SSD upgrades for Macs. Without your exact model, we're shooting in the dark to know what tools and adapters would be needed and what bus you want to expose the storage to.