Will 800MHz DDR2 SODIMM RAM work OK in a 667MHz mid-2007 iMac?

While TECHNICALLY it might work, in practice iMacs tend to be very sensitive to mismatched RAM modules and frequently experiece system instability in response. I would not recommend mixing and matching RAM in your iMac.
Hope this helps

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Will Airplay via Mountain Lion work on 2 GHz Intel Core 2 Duo (mid 2007) iMac

One of the main reasons I would purchase OS X Moutain Lion is for its AirPlay feature, in particular to stream Hulu from my iMac to my Apple TV 2. In reading some of the preliminary reviews of Moutain Lion, AirPlay is not supported on older MacBook Pro's. Will it work on my mid 2007 iMac (model identifier: iMac7,1) running a 2 GHz Intel Core 2 Duo with 4 GB 667 MHz DDR2 SDRAM?
I'm currently running Mac OS X Lion 10.7.4 (11E53).
Any help is appreciated. Thanks!

AirPlay Mirroring requires a second-generation Apple TV or later, and is supported on the following Mac models: iMac (Mid 2011 or newer), Mac mini (Mid 2011 or newer), MacBook Air (Mid 2011 or newer), and MacBook Pro (Early 2011 or newer).
Apple TV (2nd and 3rd gen)- How to use AirPlay Mirroring
How to set up and configure AirPort Express for AirPlay and iTunes
Troubleshooting AirPlay and AirPlay Mirroring
Using AirPlay
You may look into a third-party solution - AirParrot.

I have a mid 2007 iMac and the internal superdrive audio cd won't play, the DVD works. Can I purchase an external cd drive that will work with my iMac?

I have a mid 2007 iMac (Model A1224 iMac 7,1) and the internal superdrive audio cd won't play, the DVD works. Can I purchase an external cd drive that will work with my iMac?

Welcome to the Apple Support Communities
Any external optical drive will work with your Mac. If you want an Apple USB SuperDrive, see > http://www.tuaw.com/2012/04/02/use-the-macbook-air-superdrive-with-any-almost-ma c/
The best option is to take the Mac to an Apple Store and get the Mac's SuperDrive repaired

Problems with Installing 4GB RAM on mid 2007 iMac

I ordered 2 X 2GB sticks of PC2-5300 DDR2 SODIMM RAM for my Boss's mid 2007 iMac from Crucial.com. Well they arrived a few days later and today I have been trying to install them for a few hours now without any luck. I have installed new RAM about 5-6 times without any problems before on different MacBooks and iMacs. After this install I plugged back into the wall and hit the power button, the iMac made a little noise (internal noise) then nothing, just a blank screen. I thought maybe the RAM was bad so I inserted 2 other chips (we ordered 4 X 2GB to upgrade 2 iMacs) and still no luck. After making sure the iMac would boot with the old RAM (which it did), I tried installing 1 X 1GB with 1 X 2GB and it booted up perfectly. I did this with all four 2 GB RAM chips to make sure they all worked and they did. Each time I successfully booted, I went to the system profiler to make sure it recognized 3GB of RAM and it did. So my question is why is this mid 2007 Aluminum iMac not working with 4GB of RAM, but it works perfectly with 3GB? Thanks in advance, sorry for the long question.

+It seems to me that it is not just a problem with the RAM but with the imacs themselves.+
How does this make any sense when one considers that Apple successfully specified, produced, sold and delivered all three iMac (mid 2007) models with an optional 4GB of RAM pre-installed?
In addition, Apple has, without issue, sold large quantities of that same RAM online and over-the-counter for customer upgrades. Much of all that 2GB, and the latest 4GB RAM, as usual, has been manufactured by Micron, the publicly owned U.S. manufacturing company parent of the Crucial direct sales division. The same type of RAM was also being provided to Apple by other manufacturers.
I received my two orders of upgrade RAM from Micron/Crucial even before I had purchased my 24-inch iMac, and it's worked great ever since I installed it. I also installed the second half of that order into my current MacBook, purchased a month after the iMac, and it's also been working great ever since. These are certainly superior Apple products.
Obviously there has been a change in RAM manufacturing design at Micron, probably due to their change-over to the costly, challenging high-tech 50nm and 40nm manufacturing technologies, and it is nothing more than Micron's problem.
Message was edited by: myhighway

My mid 2007 iMac doesn't recognise 2GB RAM module in DIMM/1

I am trying to upgrade the RAM in my mid 2007 iMac from 1GB to 4GB. It originally had a 1GB module in slot DIMM/0 and nothing in slot DIMM/1. I inserted the two new 2GB modules, one in each slot but DIMM/1 just reports as being 'empty'. I have tried swapping the modules and different configurations of 1 & 2GB modules but DIMM/1 only reads the original 1GB module (from DIMM/0) and reports 'empty' when either of the two 2GB modules are installed.
I have reset PRAM, checked EFI firmware update and updated OSX to version 10.6.8 (from 10.5.8) but still the same result. The best I can get is 3GB (2GB in DIMM/0 and 1GB in DIMM/1). I am definitely pushing the modules firmly into place. Is there anything else I can try?

Your machine will accept up to 6GB of RAM however you must a) have the correct specifications, no variations at all and b) must push hard with both thumbs to fully seat the RAM. The correct RAM for your system would be the specifications shown here. I suspect 1 of three things with the RAM you bought.
1. Wrong specifications!
2. Incorrectly installed
3. Defective RAM
I would STRONGLY recommend using Crucial or my preferences OWC, which is the memory shown in the link.
BTW I have a late 2007 24" 2.8GHz iMac with 6GB of RAM.

4 hrs later - Computer shut down after installing new RAM (mid 2007 Imac)

Mid 2007 imac and I installed new Ram. It worked for 4 hrs then the Imac shutdown. The pressed power button but no power. Unplugged and replugged the power cord and 3 beeps sounded. I am wondering if it worked for 4 hrs or so, then why did it would it fail 4 hrs later?
I am running the correct ram because in system profiler under memory - it said that everything was ok.
Any ideas?

or maybe the back tray wasn't tight enough?
I re-installed it now and so far so good.... I pressed tight and in an upwards motion. We'll see what happens

HT4241 Does dvi to HDMI adapter works on mid 2007 iMac? Some how my iMac detect the sharp tv but the tv screen is black.

Does dvi to HDMI adapter works on mid 2007 iMac? Some how my iMac detect the sharp tv but the tv screen is black.

you need mini dvi to hdmi cable
http://store.apple.com/us/product/M9321G/B/apple-mini-dvi-to-dvi-adapter?fnode=5 1
and
http://store.apple.com/us/product/HA835ZM/A/belkin-hdmi-to-dvi-d-cable-2-m66-ft? fnode=51

I have a mid 2007 iMac.    2 GHz Intel Core 2 Duo, 4 GB 667MHz DDR2 SDRAM, OSX 10.9.5.   I attempted to do the latest update and got the message: Start up disk is full. Delete files. How do I do that?

I have a mid 2007 iMac.    2 GHz Intel Core 2 Duo, 4 GB 667MHz DDR2 SDRAM, OSX 10.9.5.   I attempted to do the latest update and got the message: Start up disk is full. Delete files. How do I do that?

Freeing Up Space on The Hard Drive
1. See Lion/Mountain Lion/Mavericks' Storage Display.
2. You can remove data from your Home folder except for the /Home/Library/ folder.
3. Visit The XLab FAQs and read the FAQ on freeing up space on your hard drive.
4. Get an external hard drive on which to store some of your files after which you can
      erase the data from your internal drive to free up space.
5. Also see Freeing space on your Mac OS X startup disk.
6. See Where did my Disk Space go?.
7. See The Storage Display.
You must Empty the Trash in order to recover the space they occupied on the hard drive.
You should consider replacing the drive with a larger one. Check out OWC for drives, tutorials, and toolkits.
Try using OmniDiskSweeper 1.8 or GrandPerspective to search your drive for large files and where they are located.

Mid 2007 iMac 2.4GHZ. after start up the iMac will slow down to a freeze. Specially while on internet (youtube).

mid 2007 iMac 2.4GHZ. after start up the iMac will slow down to a freeze. Specially while on internet (youtube).

See:
Mac Maintenance Quick Assist,
Mac OS X speed FAQ,
Speeding up Macs,
How to Speed up Macs,
Macintosh OS X Routine Maintenance,
Mac troubleshooting: What to do when your computer is too slow,
Essential Mac Maintenance: Get set up,
Essential Mac Maintenance: Rev up your routines,
Maintaining OS X,
Five Mac maintenance myths and
Myths of required versus not required maintenance for Mac OS X for information.

I upgrade my mid 2007 IMac to Yosemite and it has been running very slowly since then. I have 3GB of ram. Should I go back to Mavericks?

I upgraded my mid 2007 IMac to Yosemite and it has been running very slowly since then. I have 3GB of ram. Has this been a problem for anyone else?

Your iMac year and model is low on RAM.
3 GBs is really not enough RAM to operate your Mac under OS X Yosemite OR Mavericks smoothly and efficiently.
New Macs now ship with 8 GBs of RAM as minimum, base installed amount of RAM.
Your Mac model can take a maximum amount of 6 GBs of RAM.
I strongly recommend purchasing and installing the necessary RAM amount to meet the 6 GB RAM total.
If you live in the U.S. , Correct, compatible and reliable Mac RAM can be purchased from online Mac RAM sources Crucial memory or OWC (macsales.com).
OWC (macsales.com) has the proper RAM module or kit needed to get your Mac to the 6 GB RAM total limit.
http://eshop.macsales.com/item/Other%20World%20Computing/5300DDR2S6GP/
RAM is user installable and is, relatively, easy to install be newbie and novice Mac users.
http://eshop.macsales.com/installvideos/imac_mid_2007_mem_h/
Good Luck!

I recently updated my Mid 2007 iMac with the latest OS 10.8.5 now my external hard drives will not show up. They show up when I boot them up on a machine running and earlier OS. Is there a fix for this?

I recently updated my 20-inch, Mid 2007 iMac with the latest OS 10.8.5 now my external hard drives will not show up. They show up when I boot them up on a machine running and earlier OS. Is there a fix for this?

Can you see them in Disk Utility?
If so, can you select and Mount them?
If not, disconnect them, reset the iMac's SMC and then reconnect them.
Intel-based Macs: Resetting the System Management Controller (SMC)
1. Shut down the computer.
2. Unplug the computer's power cord.
3. Wait fifteen seconds.
4. Attach the computer's power cord.
5. Wait five seconds, then press the power button to turn on the computer.
If you still can not see them, connect them back up to the iMac running the older OS, open Disk Utility and look to see how they are partitioned and formatted.

I have a mid 2007 IMac, 2.4Ghz intel core 2 Duo with 2 GB 667 MHz DDR2 SDRAM can I upgrade to 4GB

I have a mid 2007 IMac, 2.4Ghz intel core 2 Duo with 2 GB 667 MHz DDR2 SDRAM can I upgrade to 4GB?

Maximum Memory
6.0 GB (Actual) 4.0 GB (Apple)
Memory Slots
2 - 200-pin PC2-5300 (667MHz) DDR2 SO-DIMM

Will Kingston's HyperX RAM work with my Mac?

I want to know if the Kingston HyperX RAM work with my Mid-2010 2.4GHz 15" MBP?
The 8GB version with this name: KHX1600C9S3K2/8GX
http://www.kingston.com/hyperx/products/khx_sodimm.asp
Also, what is the biggest capacity USB 3.0 Flash stick there is?

The only products on that page that meet the specifications for your MBP have been discontinued. Don't buy any of the others. Use only RAM that has the specifications Apple recommends. You will gain no benefit and may experience instability and unreliability if you use faster RAM than is recommended. It should clock down and work, but it doesn't always. And of course you'll pay extra for it.
As for USB3 flash drives, is 256GB big enough?
http://www.amazon.com/Super-Talent-SuperCrypt-Flash-ST3U56SPS/dp/tech-data/B003S E6E00
Message was edited by: eww

Is there any way to upgrade my mid-2007 imac to more than 4GB RAM?

From what i've read it sounds like 4GB RAM is the most that my iMac is capable of using, but i' m hoping that isn't true. even though it operates plenty fast for my current needs, it would always be nice to have the option. any info will be appreciated. thanks.
current 'about this mac' :
iMac
24-inch Mid-2007
Processor 2.4 GHz Intel Core 2 Duo
Memory 4 GB 667 MHz DDR2 SDRAM
Graphics ATI Radeon HD 2600 Pro 256 MB
Software OS X 10.8.1 (12B19)

Yes, 6GB is possible...
Hardware Overview:
Model Name: iMac
Model Identifier: iMac7,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2.4 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 4 MB
Memory: 6 GB
Bus Speed: 800 MHz
As Seventy One mentions... OWC.

Can i install 800MHz memory on my mid 2007 imac?

I'd like to upgrade the memory on my imac: 24 inc mid 2007 (iMac7,1).
It currenlty have a 1GB stick and a 2GB stick. Both 667MHz DDR2 SDRAM. Can I install 2x2GB DDR2 of 800MHz? and if so, would that be an performance improvement?
Specs:
24in iMac7,1
Intel Core 2 Duo 2.4GHz
Bus Peed 800 MHz
Memory: 3GB (as above both 667MHz)
Thanks

You are welcome. That is the same machine as mine (20" version). Although Apple rates it as accepting 4gB, outside vendors have tested it with 6gB. This happens quite often with quoted RAM quantities.
Maximum Memory 6.0 GB (Actual) 4.0 GB (Apple)
Memory Slots 2 - 200-pin PC2-5300 (667MHz) DDR2 SO-DIMM

Will 800MHz DDR2 SODIMM RAM work OK in a 667MHz mid-2007 iMac?

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