First upgrade done. Upgraded to El Capitan. Second Upgrade done. Took the Ram from my old laptop and followed the steps to replace one of my 2gb ram chips with a 4gb ram chip from my old Toshiba. Unfortunately, it was only a 6gb computer, not 8. The ram is a samsung brand. Funny thing is when I look at the 2gb ram that took out of my MacBook and compare to the remaining 2GB ram from the Toshiba, they are identical hynix part numbers. It shows on the top line 2GB 1Rx8 PC3 - 10600S - 9 - 10 - B1 and on the second line it says HMT325S6BFR8C - H9 N0 AA 1137.
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