Hi, I have a MBP 13 "i5, and I would like to upgrade the ram memory, I saw that there are people who can do the work with 8Gb 1600Mhz. But, I saw also, that there are choices of 16GB, and also the 1600Mhz and 1866Mhz. I wonder if these kits (16Gb 1600Mhz~1866Mhz) work in my MBP i5 and which would be indicated. Thank you! Post Script: Is a i5 MBP, I know there are people who gets it with the i7, is not my case... Thank you very much.