Macbook Pro Retina 13 (late 2012) SSD replacement, putting in a SATA 2.5' SSD drive?
Just managed to upgrade my Late 2012 Retina Macbook Pro using a Samsung mSATA 512GB SSD and an 7+17 pin adapter like this one:

http://www.aliexpress.com/item/New-Lightweight-mSATA-to-17-Plus-7-Pin-SSD-Adapter-for-MacBook-Pro-Retina-OS/32429243180.html?spm=2114.01020208.3.2.huLuZr&amp;ws_ab_test=201556_2,201527_1_71_72_73_74_75,201409_2

WORKS!

PS. Use "sudo trimforce enable" in the Terminal, to get trim and full speed.

PS1. Newer Retina Macbook Pros use the 18+8 pin adapter like this one (don't know if they fit, late-2012 Retinas have a lot of room unlike the newer models):
http://www.aliexpress.com/item/New-Lightweight-mSATA-to-18-Plus-8-Pin-SSD-Adapter-for-MacBook-Pro-Retina-F-OS/32420956007.html?spm=2114.01020208.3.2.hligL2&amp;ws_ab_test=201556_2,201527_1_71_72_73_74_75,201409_2