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I’m wanting to install a 128GB Crucial m4 2.5" SSD w/ 3.5" Adapter Bracket into my 2007 iMac. Will the thermal sensor currently installed having any issues determining the hard drive temperature? Will it cause the fan hard drive fan to run at max speeds? From what I understand, the thermal sensor issue reared it’s head with the 2008 or 2009 models. I think I should be safe. But, I would like some confirmation from someone who knows. Will there be any other issues using the thermal sensor? Will there be any issues with 3.5 inch adapter?

We have not personally installed an SSD on this particular model, but it does work. Also, this question has been covered many times on Answers. Simply install the SSD into your adapter and install it into the iMac. The most critical part is transferring your thermal sensor over to the SSD. The thermal sensor can be seen in the guide here. Before reassembling your machine, be sure that the thermal sensor will remained adhered to the body of your SSD (you can always add strips of tape over it to hold it on) and you should be fine.

The systems I/O limit you. Your iMac only has SATA II I/O (3.0 Gbit/s). The ‘11 iMac’s with EFI update 1.6 applied will give you SATA III (6.0 Gbit/s).

I used the Newer Tech AdaptaDrive 3.5"–2.5" adapter and it worked flawlessly for mounting the much smaller Samsung SSD into my early 2008 iMac’s drive mount.

Well, I did the get the Crucial M4 128 GB SSD installed and it’s working beautifully. Taking the iMac apart was tedious but very easy. Here’s my tips:

  1. buy the torque screw set from ifixit.com or somewhere online (but why not ifixit), you can’t find a screw set that small anywhere like home depot or radio shack
  2. the crucial 3.5 adapter kit does not fit from crucial we had to cut a large piece of foam and place it behind the kit to secure one end from moving up and down (not may favorite solution, but it’s very secure)
  3. a third party SSD will NOT have trim enabled with Lion, be sure to find one that has a fairly decent garbage collection feature installed on the disk itself. not sure if this is going to cause a problem or not
  4. also, the thermal sensor is on the SSD and the HD fan is not spinning up crazy. It’s nice and quiet SSD is great. Applications open in about a second or two. It’s CRAZY!!! Never going back.

I have a 2007 imac. I installed an external SSD hard drive to the firewire port. The new el capitan OS on the external hard drive and the imac boots up from the external drive. Works well. It ignores the internal disc hard drive and there is no problem with the fan or thermal sensore.

The SSD I’m getting comes with a 2.5 to 3.5 adapter. So, I’m good there. But my iMac is before 2008/2009 so the thermal sensor is supposed to work so that the fan doesn’t fun at full speeds. I have you tried installing an SSD on my particular model iMac Intel 20 Inch 2133?

I just installed a Corsair Force 3 in my EMC 2133 20" iMac 2.0 ghz C2Duo, 4 gb DDR2 667 MHz. Seriously doubled my performance!! No lie! Was very easy to install. Lion runs so fast now!! The thermo sensor is not that bad except you do need to tape it to the drive. Other than that, It’s up to you to secure it in the 2.5" drive in the 3.5" opening. I basically have it screwed in using the bottom mounts. I figured it’s pretty stable considering it’s a stationary computer. You will not be disappointed with this upgrade!

I’ve just installed a Crucial M500 480Gb SSD in my mid 2007 iMac (2133). Everything went flawlessly and the guides on iFixit were very clear and helpful. Because of the different drive size (2.5inch) I bought the Newertech AdaptaDrive 2.5" to 3.5" Drive Converter Bracket in a Dutch online store. It took me about 45 minutes to open up the iMac, remove the HDD, install the SSD en to close the whole thing again. Removing the LCD display is actually the ‘hardest’ part because you don’t want your ‘greasy and sweaty’ fingers on it. In the end, it all seemed simple and straightforward. I’m now running Lion with 4Gb RAM, the 480 Gb SSD and TRIM enabled; my iMac feels like new. The disk speeds are roughly 4,5 times faster than the original HDD.

I just installed a Seagate Momentus XT 500GB Hybrid SSD in this iMac (20") I used Intel’s OEM 3.5 to 2.5 adapter, getting it to mount properly with the sata data/power cables was a little challenging but I eventually got it. I put the thermal sensor on the HDD as well, experienced no problems with fan speeds.

My answer is a bit late but I had kept my mid-2007 iMac at Snow Leopard and it performed well. Migrating to Mountain Lion saw a noticeable decrease in performance and I opted to install an SSD. I put in a Samsung 840 Pro series, 256 GBytes SSD in my iMac and saw a remarkable performance increase. I followed the disassembly instructions on iFixit and the only problem encountered was related to the mounting bracket. The bracket has to be full length. In my case, the metal adapter had undersized holes with different thread pitch. I re-drilled to correct size and re-tapped the screw holes to work with Apple original hardware. I also used Chameleon SSD Optimizer, which seems to work like a charm. The SSD is by far the best upgrade I have ever done.

I’m thinking of doing this to my 2007 iMac. I have a Samsung EVO850 SSD drive. Anybody had any issues with these inside iMac 2007?

I’ve just tried doing this- but the STA cable inside the Mac doesn’t support my 850 EVO drive- so I have resorted to booting from it externally via usb. not ideal, but still an improvement