The memory pressure just from running Chrome on 2x2GB was killing me slowly, very slowly, always in the yellow and climbing.
I bought 2x8GB for my mid-2012 macbook pro 9,1, and I tell you. I went through some of the 1-star reviews to refresh my memory (ha, no pun intended) on them and I think MANY of the bad experiences are because people did not thoroughly research what they needed.
I decided to come back and actually do a review for OWC because I think they are extremely underrated.
Turning on the macbook pro, I verified that it had 16 gb RAM total. Just discharge your static electricity by touching a metal frame, and blow the dust off your components while it's still open. Installing it in Macbook Pro mid 2012 was a snap, I didn't even need to remove the battery connection.
For $89.99 plus tax, this was a deal! As RAM is RAM, as long as the qualifications are met, you don't need to pay more as it offers the same, if not, better performance than the more expensive ones. That being said, this is a Hynix brand by timetec so it's comparable to your OEM RAM type when you purchased you macbook pro. Runs as smooth as the day I got it! Highly recommended!
Went and verified that instead of 4GBs I now have 8! Super helpful considering I'm an Info Systems major and I have a decent amount of software that I need to run regularly. Either way, I found instructions for my specific model on the Apple website and it only took me about 7-10 minutes. The only negative would be that I didn't find the instructions on installation very clear as far as the design but I think that's mostly because I wasn't very familiar with the inside of my own computer. It arrived on time and I was eager to get started. I bought the bundle Amazon suggested with the screwdriver/extra screw set since I didn't already own one. I searched around and found all the good reviews so I decided to check it out.
I did some research which eventually directed me to upgrade the RAM. I've had it since I started college 4 years ago and it was doing fine but was beginning to run a little slow.
I have a 13-inch, Mid 2012 MacBook Pro (Model No: A1278).