Will it work on early 2011 MBPs original 1333Mhz? Should I buy it for this upgrade?
1321763
I bought these memories to use on my iMac 21 Late 2013 and worked perfectly. This memories are faster (1600 Mhz) that you have on MacBook Pro (1033 Mhz), so I guess that could work (the memories works with the maximum speed that Mac support). In the memory packaging says that works with any MacBook Pro 2011 or newer.
1300843
youre saying 2.1ghz? it should work as long as you have a 13". if you aren't sure then compare the model numbers.
1067720
I use that ram on my this MB. I can confirm it works just fine. You just have to select the correct xmp profile to get it to run at 2400mhz
1593868
Yes but, its better if you bought the 1600 mhz version to balance the speed, since your system already uses 1600, and this module only runs at 1333. Sometimes systems become unstable with modules running at two different speeds.
900076
I installed this memory in a MacBook Pro 15-inch, late 2011 laptop, and it worked perfectly. I selected the memory from the kingston website (http://www.kingston.com/us/memory) and purchased from amazon. The amazon vendor took about 4 weeks to deliver. Laptop improved in speed significantly. No issues since installed.You can view memory, pin specs at the website, it is useful in selecting memory for your specific device(s). Additionally, if memory is for an apple, kingston is the only memory that does not void the apple warranty.Hope this helps.Mark
701340
It should be compatible with 1333 and 1066. So it is 1333 unless your system only runs at 1066. Compare with the picture to see if you got the right memory.
2129801
Dude just wait for the Merom MBPs in Sept. Performance will be identical but it's safe to assume some tweaking for better thermals and overall robustness.
761048
this will take some time 50 Gbts will take 10 min due to the early 2011 macbook probably having 5400 rpm hard drive so will not get max speed out of the transfer rates still the fastest way probably 3 to 3.5 hours
1390643
This is 1600mhz stock(default setting), you can lower it in the bios to 1333 or 1066mhz. This is plug n play it will set itself to 1600mhz unless your computer automatically downgrades it 1333mhz. Usually that happens for compatibility, but you can up it in the bios. I don't know much about macs concerning hardware compatibility, but I assume it should be ok (it's a computer in the end). Check "toms hardware" site they can be more informative.
1874952
Stock speed is 925MHz but I run it at 1100MHz stable with no need for voltage tweaks (locked).
2144062
Works well in my 2GHz MacBook 1,1 CoreDuo. I ran the memory test in Tech Tool Pro 6 and it passed. I also ran memtest from an older Ubuntu install CD and it passed. I have had one panic crash though. It is a machine given to me by my daughter when she upgraded, and I haven't used it that much.
1512209
It is best to pair matching memory. So you'll want to buy another 4gb stick if that's what you currently have. Make sure the frequency is the same too, the majority will be 1600MHz. If you want to be sure you'll need to look up manufacturers specs online for look on your existing memory or it might be on the memory itself. Hope that helps.
603380
It did not work for me, I believe the memory has to DDR3 10,600 to have 16gb working in the mid 2010 13" Macbook Pro, I could get up 10Gb using one stick of the 1333Mhz memory with one stick of the 10600mhz memory, I have also found at least one other person on the internet reporting a problem with the 1333mhz memory.
944433
Yes it will. Installed one on a MB of the same year, boot up time is under twelve seconds now.
16606
Yes this will work. It will be downgraded to the slowest memory you have in your machine. You will have to install the slower memory in the first slots and the faster memory in the next slots. Otherwise you will only see the first slot memory. Their memory is good as I have 12 gig in various machine's for over 2 years now and no trouble. I highly recommend them.
1154166
Hi Ryan, Based on general specifications, this memory should work in the Early 2011 Macbook Pro model laptops. However Apple computers can be more specific, for that reason we have branded memory which is tested and guaranteed to work in specific systems. The 4GB Apple branded memory guaranteed to work in the Early 2011 Macbook Pro is part number KTA-MB1333S/4G, found here: http://www.amazon.com/Kingston-Technology-1333MHz-KTA-MB1333S-4G/dp/B00B2UWR44/ref=sr_1_1?s=electronics&ie=UTF8&qid=1432913022&sr=1-1&keywords=KTA-MB1333S%2F4G Thank you for choosing Kingston as your upgrade partner! -Jewel, Kingston US Technical Support
1662777
yah..It works fine on my late 2011 macbook pro..so far, I don't have any problem on my macbook...of course faster than before that's the best thing..