Timetec 8GB KIT(2x4GB) Compatible for Apple DDR3 1067MHz / 1066MHz PC3-8500 for Mac Book, Mac Book Pro, iMac, Mac Mini (Late 2008, Early/Mid/Late 2009, Mid 2010) MAC SODIMM Memory RAM Upgrade

I bought this RAM upgrade after an installation on my wife’s late-2012 MacMini greatly improved performance. In that case we were replacing the factory-installed 4GB with 16GB—a 4-fold increase. Operation went from sluggish to lightning speed. It was like night and day.I had already upgraded my late 2009 iMac from the factory-installed 4GB to 12GB about 5 years ago. But with RAM prices down, I decided to try going all the way to 16GB. That would be a 1.33-fold increase.My first try went badly. But after two more attempts I got everything right and the computer is performing excellently. Here are the lessons learned in hopes it can help others.The four memory slots on this iMac are at the bottom of the case, just under the Apple logo. You shut down the computer, unplug, spread a towel on your work surface, and lay the computer screen-down on the towel. If you lift up the adjustable base, a small rectangular plate with vent holes becomes accessible. After wrapping a grounded discharge strap on your wrist, you loosen the three captive Philips head screws on the plate, revealing the four memory cards. My vent plate and the visible edge of the RAM cards were covered in dust, so it was a good time to clean that up first.Pulling out the RAM cards is a little more difficult than on most modern computers with flip-up slots. There is a plastic tab that looks like shiny black electrical tape folded over each of the two pairs of memory slots. Finagle the tab out so one end is free, and pull. Don’t be afraid to use a some force until you hear a click and see the two paired RAM cards pull towards you about an eighth- to a quarter-inch.Now ground yourself again (wrist strap preferred but not essential) and pull out the cards you want to replace. In my case there were two 4GB Crucial brand replacement memory cards in the lower (that is front) slots, and the two original MAC 2GB cards in the upper slots. I replaced the latter with my pair of new 4GB Timetec RAM cards.After pressing in the new cards and screwing the cover plate back on, I plugged the iMAC back in for the test. Disappointment! A dark screen, and a series of very scary loud beeps that last several seconds. The beeps just keep going—not just three as in one of the descriptions I read. Time to Google the problem.The best advice I could find was that the new memory cards, or at least one of them, are probably faulty. Now, I wondered why I had ever gotten into this, as the computer was working fine before my attempted upgrade. But with no other options, I decided to try reinstalling the original MAC 2GB cards. I unplugged the machine, opened up the cover again, and put the old cards back in. When I turned the machine back on, the infernal beeping started up again.Now I was really cursing myself. Had I destroyed a perfectly good computer, my go-to workhorse, all for an unnecessary upgrade? Time to calm down and think it through. I shut down, unplugged, and again opened up the RAM slot.Now something dawned on me. I had had some trouble replacing the cover the last two times. Could it be that the memory cards were not fully inserted? After fiddling with them a bit, I felt one of the older replacement cards in a lower slot press in more on one side so that the front edge of the card was flush with the edge of the slot. After some more pushing and wiggling, I got the other side of this card to flush up as well. It took a lot of urging, more than I had been ready to try on the first two installation attempts.Soon, with help of a large plastic spudger, I had all the cards seated flush. This time the cover went back on much more easily, and I was feeliing good about it. Plugged back in, restarted the machine, and voila! Everything worked. . . . . Phew. Project successful. Hope this might help somebody with a similar problem.

Excellent tech support. I had ordered wrong type and timetec identified the correct type and maximum ram my older MacBook Pro could handle. Installation was a matter of minutes and booted right up.The shipping was good and delivered in the estimate time at checkout.Side note Amazon was excellent in returning and credited the previous purchase of wrong type

They work very well on my late 2009 MacBook; I upgraded from 2GB to 8GB. However, if you really want to feel the difference, installing an SSD is the way to go.

My late 2009 MacBook Pro was getting pretty sluggish with only the 4GB of memory it came with. After a quick review of a YouTube video, I was able to easily replace the 2x2GB memory sticks with these 2x4GB to bring my total memory up to 8GB. I can see a difference in snappiness of programs once they have been loaded into memory. Loading is still a bit sluggish but that is probably more a function of the disk subsystem.My wife had an iMac with the same 4GB memory problem. I hadn't anticipated this but found that her iMac has four slots, unlike the two I have on my MacBook Pro. I then took my old 2x2GB memory sticks and plugged them into the two vacant slots in her computer thus bringing it up to 8GB.So, in my particular situation I got two 4GB to 8GB upgrades for the price of one. At $35 delivered, this was a very good deal and the new memory has been working flawlessly.

Works perfectly I was able to make my early 2009 iMac run better than before hopefully, I’ll change the GPU in the graphics card soon but I that’s for a later date but all said and done10/10

A review from one blind person‘s perspective…I Purchased this to upgrade the memory in my Mac Mini mid 2010 MC270LL/a. Unless you have previous experience taking apart your mini, you will probably want sighted assistance with this if you are blind. Regardless of vision, by searching my mini model number on YouTube, I was able to find a perfect how to video on installing and upgrading the memory. I highly recommend watching this video before and during the installation as it was incredibly helpful. My 14-year-old son was able to help me execute the installation in just a few minutes. Apple makes their products very easy. Installing the memory basically required taking off the panel on the bottom and popping out the old memory and literally popping in the new memory. It did take a couple tries to get it settled in just right, but when it was in there, the upgrade vastly improved the speed of my machine. I highly recommend installing full capacity of memory in your machine. This product has worked perfectly with no problems since the installation and for the price gets my highest rating!

I have a mid 2010 MacBook Pro and recently was lucky enough to find a charger replacement but wasn’t too sure I could find the RAM upgrades I should have upgraded ages ago. Not only did this seller have them, but it was a super simple swap; ten screws on the bottom, simple press on tabs beside the old RAM and a quick pop in of the new ones, good to go! Booted up the laptop and went into About this Mac to confirm, fully upgraded. I feel like this gave me a few more good years out of the old gal and am already happy with the noticeably better performance. I don’t game on this but I do some pretty demanding graphic design so it’s immensely helpful to get a little more efficiency in my workflow.

funcionó a la perfección en una macbook pro 2009