Timetec16GB KIT(2x8GB) Compatible for Apple DDR3 1333MHz PC3-10600 CL9 for Mac Book Pro (Early/Late 2011 13/15/17 inch), iMac(Mid 2010, Mid/Late 2011 21.5/27 inch), Mac Mini(Mid 2011) MAC RAM Upgrade

Just as described. Worked perfectly for my “jukebox” 2010 iMac.

I used this to upgrade my late 2009 27 inch iMac which really needed the boost when I decide to upgrade the OS beyond what Apple normally allows. The install was simple on an iMac and they were recognized by the OS without issue. Doing some checking, it seems the specs are exactly as advertised and when I did a complete memory test I had no errors of any kind.Like most memory for computers you can usually get it to fail by hitting it hard right out of the gate if there is anything wrong with it. No matter what I threw at it, it kept going and didn’t crash meaning that it will probably last a good long time.At this price, it’s well worth it to bring some life to an old system.If you want to upgrade your old Mac to a newer OS, you can look up OpenCore Legacy Patcher and that will get you on the right track.

Bought these to upgrade an older (late 2011) Macbook Pro that came with 4Gb of total RAM. Owner manual for the computer says it can be upgraded to 8Gb. Online blogs suggested the computer would recognize 16Gb. So it was an experiment. RAM modules came nicely packaged and the URL timetecinc.com on the package label takes you to their web site where they include some installation tips and guides. Install was easy. Keep track of the tiny screws for the Mac case. DDR memory is stacked one over the other and are truly plug and play to replace. My mac is noticeably faster booting and recognizes the full 16Gb I installed.

My mid 2011 iMac has been running slow and overheating and decided to give it a decent upgrade after getting me through 4 years of college. As a start I decided to get the 8gb ram package. You unscrew the 3 Phillips screws at the bottom and you insert the ram cards in. After doing this I realized that I never cleaned my Mac so I decided to buy a air can to remove all dirt. I’ve decided to open my Mac and also clean the dirt on the fans. After cleaning I put everything back together and turned on my Mac and it turned on in less than a minute which before this modification it was like 3 minutes. I tried clicking on applications and wow it’s fast compared to before. I can run multiple applications at the same time without any problems like any lagg. I remember clicking on a application multiple times so that it can open up faster, I don’t think it worked but now with this ram upgrade they open up real fast. I also seen it downloads music fairly fast. I have nothing but positive comments for this. I recommend every Mac user to do it it’s fairly easy that anyone can do it. I got an Samsung SSD on its way to help improve how fast it can run and reduce heat output. Happy that it will run just like a new 2020 computer.

I bought this RAM to upgrade my 27" mid-2011 iMac. After the upgrade, I can notice a significant difference—the system is running like a champ with no performance lag. The RAM also comes with a limited lifetime warranty, which is a no-brainer. “Support Small Businesses”

I upgraded an old laptops ram from 4 gb total to 16 with this and it made a huge difference. Especially in start up alone. While the computer has other struggles the ram made vast strides towards making it modern computing.

My 6-year old iMac is thanking me for upgrading the memory. It is now much more responsive and should keep going for at least a few more years. One thing I would suggest that everyone do when upgrading the memory is to run a hardware test before and after the upgrade. On my iMac, you get the hardware test by pressing "D" while starting up (you have to be connected to the internet, though). In my case, I started getting kernel panics after the upgrade and one thing I read was that bad memory can cause this. I tried the hardware test and sure enough, there was a memory error. I put the original memory back to check there was no error in the original memory sticks. I then tried various combinations of different memory sticks and different memory slots (the memory slot can also cause a problem) and the only thing that was consistent was that I would get an error with one particular memory stick. The return process with Amazon was seamless and I ordered another pair of memory sticks. No memory errors with those sticks, so I'm assuming that the bad stick was just a glitch (I've had one other time with a memory stick going bad after a few years). I'm not going to fault the company for what I think was a minor glitch.

I am an EE/COMP Engineer so it was trivial to install this. However, the extra memory was not recognized when my computer rebooted. I realized that my battery had likely died before I did the install and I needed to perform a *full* cold reboot. I also reset my PRAM (probably unnecessary). This resets some of the parameters of your Mac if there are some issues or corruption. It is done during a cold boot up cycle via CMD-OPTION-P-R (four keys held simultaneously during the initial boot sequence). In any case, the MacBook Pro (Early 2011) recognized it as a full 16 GB (2 x 8 GB) when it came back up. Note that Apple officially only recognizes 8 GB in this model, but that was because when they last tested it the newer modules were likely not available. To utilize larger memory, designers have to make accommodations to support additional memory module address lines. Each additional address line doubles the supported memory. Fortunately, the Mac hardware designers did the the right thing and added the necessary address line support so we could utilize the larger memory sizes. Hope this helps someone and thanks for reading.