2007 imac wont recognize new ram

installed 2gb centon ddr2-667 memory in empty slot, supposed to be mac ready but computer does not change still says slot is empty? any suggestions?

Correct and reliable Mac RAM can be purchased from online Mac RAM sources Crucial memory or OWC (macsales.com).
If you purchased RAM from any local computer or any electronics retailer, you bought incompatible and wrong RAM!
Return the RAM and get a full refund.
There are NO local electronics retailers that carry the proper Mac RAM.
Reliable and correct Mac RAM can only be purchased online.
FYI, your iMac can take a total of 6 GBs of RAM.
Can only be purchased from OWC ( macsales.com).
http://eshop.macsales.com/shop/apple/memory/iMac/Intel_Core_2_Duo
Good Luck!

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Use a Thunderbolt to Ethernet or FireWire adapter.
(95019)

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The old RAM won't be compatible with the new generation iMac, but you may be able to sell it privately quite easily.

Migration Assistant adn iMac wont recognize Target Disk Mode of iBook

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My Imac wont recognize my log in password

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(I've own the computer for 3 or 4 years, and I think it kinda needed it...)
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If you think it is "root" then the fllowing tells you how to enable/disable root user using your admin password:
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OK I purchases some RAM from crucial.com Here is what I bought:
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I installed the software but unfortunatelyUnfortunately, the machine does not recognize the new RAM. Both of the slots are listed as EMPTY. My question is -- is there anyway to tell whether I installed in right? Also, is this the correct RAM to buy? I'm a little confused - I would be happy if you could help!
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Hi,
You don't have this 2.3 do you? The Dual Core? If so you have the wrong RAM.
http://support.apple.com/kb/SP37
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If that still doesn't do it, shut down your Mac and pull the plug, open up your mac and touch one of those little back plates on the back where your video card is (static electricity) and press the PMU button as described on this page:
http://support.apple.com/kb/HT1436
Remember sometimes it can take a good deal of pressure to seat RAM. Just don't go crazy. But first make sure, looking at the top article, that that isn't the model you have. If it is *do not* try to seat that RAM.
Message was edited by: Samsara

Imac wont recognize printers

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You probably won't get any help unless you are more descriptive. At a bare minimum we need to know what version of Lion is installed on the iMac (10.7.2 is current), exactly what printers you have and exactly how they are connected to your computer. Also please check http://support.apple.com/kb/HT3669 to see if your model printers are supported. The first thing I'd do though is System Preference - Print & Scan - highlight the first printer in the box on the left and right click it and choose Reset Printing System. It will look similar to:

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Hello brad,
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Message was edited by: iGhost

Hi iGhost-
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Thanks mbutler1981. Advance Format drives shouldn't be a problem for this computer, it is older one that you can run into issues with.
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If you are unable to see the drive in the BIOS, verify that you have the latest version of BIOS using this for guidance:
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If you are still having problems with this drive in this computer, the problem is either the drive itself, or a compatibility issue. The manufacturer of the drive might be able to confirm the final diagnosis.
TwoPointOh
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the bottom to say “Thanks” for helping!

G4 Quicksilver won't recognize new RAM

Hi
I found a similar thread through searching the archives, but figured I should start a new one. I have a 2002 Quicksilver G4 with 1GB RAM running OSX 10.4, that still runs surprisingly well (at least compared to my PC). I wanted to max the RAM out to 1.5GM and upgrade to Leopard, so I bought a 512MB DIMM from RamDirect. I installed it and it doesn't work. I tried various combinations in the slots, still no go. I even placed it in Slot 0 as the only RAM DIMM and the computer wouldn't boot. I have the latest updates to everything, as far as I know. Here are my system specs below - DIMM2 shows empty whether the new RAM is installed or not.
RamDirect seems to be a reputable dealer, they've been around for a while. The Ebay auction lists the RAM as new, Apple-certified 512MB 64x64-75 3.3v PC133 SDRAM 168pin DIMM that is compatible with a variety of G4/G3 models shown on the page (including mine). It doesn't say anything about buffered or un-buffered. The new RAM looks exactly like mine, and is labeled Samsung PC133 Single Bank. My system profiler shows my RAM as PC133-333, no ECC reference, so I'm not sure what I have.
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DIMM0/J21:
Size: 512 MB
Type: SDRAM
Speed: PC133-333
Status: OK
DIMM1/J22:
Size: 512 MB
Type: SDRAM
Speed: PC133-333
Status: OK
DIMM2/J23:
Size: Empty
Type: Empty
Speed: Empty
Status: Empty
Machine Name: Power Mac G4
Machine Model: PowerMac3,5
CPU Type: PowerPC G4 (2.1)
Number Of CPUs: 2
CPU Speed: 1 GHz
L2 Cache (per CPU): 256 KB
L3 Cache (per CPU): 2 MB
Memory: 1 GB
Bus Speed: 133 MHz
Boot ROM Version: 4.3.3f2

OS X is "picky" about RAM quality, so you may have gotten some substandard RAM. Unless the RAM is totally defective, it will probably still operate in a PC.
Look at this link: *Testing RAM* @ http://guides.macrumors.com/Testing_RAM
Then download & use Memtest & Ramber.
One thing you might try. Get a soft rubber eraser & gently rub the RAM contacts, in the outside chance that there may be some contamination (from finger contact/handling).
 Cheers, Tom

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I would just caution you to make sure you're pushing straight down, because with that amount of force, pushing at any angle other than vertical would surely break the stick.
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Ashwin

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2007 imac wont recognize new ram

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