Installed on my iMac mid 2007, why it doesn't recognize both 2GB sticks at the same time, but only when paired with one of the old 1GB?
1155374
Although the iMac (Late 2006) computers will accept up to a 2 GB SO-DIMM in each of the two memory slots, the iMac will only support 3 GB total memory. Check out memory config. at this site http://support.apple.com/en-us/HT3011
1155375
I would be asking Crucial and Apple that question. Also try Apple Support Communities.
1155376
Try resetting the PRAM and see if that helps. Its possible One of your chips is faulty.
1155377
https://support.apple.com/en-us/HT201595The maximum amount of random-access memory (RAM) you can install in the machine is 4 GB: >PC2-5300 >Unbuffered >Nonparity >200-pin >667 MHz DDR2 SDRAM
2160754
I have a white Macbook circa 2008. It had 2GB. I replaced the two 1GB's with a 4GB and a 2GB. This was back in December 2012. I've got 6GB confirmed. It's worked fine ever since. No problems whatsoever.
1099726
Hi Hal,I'm Jewel with Kingston Technical Support, here to address your question. There is no Late 2007 iMac 20-inch model. Both the Mid 2007 and Early 2008 iMac 20-inch models support a maximum of 4GB of DDR2 memory using two 2GB memory modules. As such, KTA-MB1066/4G is not compatible as it is a single 4GB DDR3 memory module. If you have the Mid 2007 model the recommended kit for 4GB is part number KTA-MB667K2/4G and for the Early 2008 model the recommended kit is KTA-MB800K2/4G. For any further assistance, please call us at 1-800-435-0640 (USA and Canada only) M - F 6am - 6pm PT and I or another available Technician will assist you.Thank you for selecting Kingston as your upgrade partner. Hi Hal,I'm Jewel with Kingston Technical Support, here to address your question. There is no Late 2007 iMac 20-inch model. Both the Mid 2007 and Early 2008 iMac 20-inch models support a maximum of 4GB of DDR2 memory using two 2GB memory modules. As such, KTA-MB1066/4G is not compatible as it is a single 4GB DDR3 memory module. If you have the Mid 2007 model the recommended kit for 4GB is part number KTA-MB667K2/4G and for the Early 2008 model the recommended kit is KTA-MB800K2/4G. For any further assistance, please call us at 1-800-435-0640 (USA and Canada only) M - F 6am - 6pm PT and... » Read More Hi Hal,I'm Jewel with Kingston Technical Support, here to address your question. There is no Late 2007 iMac 20-inch model. Both the Mid 2007 and Early 2008 iMac 20-inch models support a maximum of 4GB of DDR2 memory using two 2GB memory modules. As such, KTA-MB1066/4G is not compatible as it is a single 4GB DDR3 memory module. If you have the Mid 2007 model the recommended kit for 4GB is part number KTA-MB667K2/4G and for the Early 2008 model the recommended kit is KTA-MB800K2/4G. For any further assistance, please call us at 1-800-435-0640 (USA and Canada only) M - F 6am - 6pm PT and I or another available Technician will assist you.Thank you for selecting Kingston as your upgrade partner. « Show Less
1558602
Hi I found some info on Apple:Memory specificationsThese iMac computers have two side-by-side Synchronous Dynamic Random-Access Memory (SDRAM) slots in the bottom of the computer.The maximum amount of random-access memory (RAM) you can install in the computer is:Computer Memory Type Maximum MemoryiMac (Mid 2007) DDR2 4GB (2x2GB)iMac (Early 2008) DDR2 4GB (2x2GB)iMac (Early 2009) DDR3 8GB (2x4GB)with this specs I think that this memory ram doesn´t fit on your IMAC. I think that your IMAC supports up to 8 gb memory ram so you can buy these 8GB 2X 4GB PC3-8500 1067MHz DDR3 APPLE RAM MEMORY SODIMM 204pin (PARTS-QUICK BRAND) You have to be sure that these fits your IMAC, I think that these fits well Hi I found some info on Apple:Memory specificationsThese iMac computers have two side-by-side Synchronous Dynamic Random-Access Memory (SDRAM) slots in the bottom of the computer.The maximum amount of random-access memory (RAM) you can install in the computer is:Computer Memory Type Maximum MemoryiMac (Mid 2007) DDR2 4GB (2x2GB)iMac (Early 2008) DDR2 4GB (2x2GB)iMac (Early 2009) DDR3 8GB (2x4GB)with this specs I think that this memory ram doesn´t fit on your IMAC. I think that your IMAC supports up to 8 gb memory ram so you can buy these... » Read More Hi I found some info on Apple:Memory specificationsThese iMac computers have two side-by-side Synchronous Dynamic Random-Access Memory (SDRAM) slots in the bottom of the computer.The maximum amount of random-access memory (RAM) you can install in the computer is:Computer Memory Type Maximum MemoryiMac (Mid 2007) DDR2 4GB (2x2GB)iMac (Early 2008) DDR2 4GB (2x2GB)iMac (Early 2009) DDR3 8GB (2x4GB)with this specs I think that this memory ram doesn´t fit on your IMAC. I think that your IMAC supports up to 8 gb memory ram so you can buy these 8GB 2X 4GB PC3-8500 1067MHz DDR3 APPLE RAM MEMORY SODIMM 204pin (PARTS-QUICK BRAND) You have to be sure that these fits your IMAC, I think that these fits well « Show Less
236128
Yes!, I did replace same iMac's 2008 memory around 6 months ago and works great.
1857815
There is a page on Apple's website that may answer you question (http://support.apple.com/kb/HT1270?viewlocale=en_US#link1). Your Mac does not support 16GB of RAM, though 8GB are enough to run both these programs smoothly. This memory is not the right choice for your Mac, as it is (PC3 - 12800), and your Mac requires (PC3 - 8500). I've already searched the one that is just right, which is in this link: http://www.amazon.com/Crucial-PC3-8500-SODIMM-204-Pin-CT2K4G3S1067M/dp/B008LTBJFM/ref=sr_1_1?s=electronics&ie=UTF8&qid=1413312655&sr=1-1&keywords=Crucial+8GB+Kit+%284GBx2%29+DDR3+%28PC3+-+8500%29
25714
I have no idea. I put these in a Dell 4010N. I have never put RAM in an iMAC ...
442681
Martin, was it the right memory module for your Mac? The module must be Mac certified, otherwise you will experience this problem.
436722
Not sure I have an iMac. I think you have the laptop computer which may have a different ram configuration. Change ram in a notebook can be difficult
1175573
If you want to be positive about compatibility, click the Apple icon at the upper left corner of your screen. Then click "About this MAC" and look at what it says for "Memory" if you have 1066 MHz DDR3 or 1067 MHz DDR3 it is compatible. If not, it is not compatible and you will need to look for the unit with the same type of RAM and MHz.
1765581
I have a 2009 iMac and went from 2 gb to 16 and it is great. Check on your computer it will tell you what kind of ram and how many slots are available.
4016
Although I am not an expert on Macs, I checked over the specs for your computer and it looks like this RAM will work just fine in your iMac!
1633616
I purchased this RAM for a late 2009 iMac, the RAM worked fine until earlier this year and now 4 of the 4 4GB sticks are failing. I wouldn't recommend this RAM for Apple products
1338784
Pretty sure all the iMacs that use DDR3 require SO-DIMMs, not full-size memory. Here's a link to Apple which seems to suggest this memory won't work. http://support.apple.com/kb/HT5523
506422
I don't know, but I am sure that if you check the motherboard spec of the iMac what memory modules it supports, you will be able to find out.
70232
Actually, up until a couple of days ago on Apples iMac 20" Customize your Mac page, it said in the learn more link under RAM to 'choose the 1x1GB stick if you plan on upgrading later' or something like that. I emailed them... in a hopeless attempt to get them to actually add the option but all they did was removed that part in the learn more section :(
2011858
Imacs normally have 4 SO-DIMM DDR3 SDRAM. You need to make sure the number of pins are correct. I don't normally work with macs. But what i would do is is ooen the back check to see what is already there and if u have extra slots left over to add, get the brand of ram you already have and check to see if they have them available online and just add more. This is the best way to check what brand or model of ram you have in your imac.