Model A1224 / Mid 2007 and Early 2008 / 2, 2.4, or 2.66 GHz Core 2 Duo processor

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Upgrading old HD to new SSD

Greetings all,

I am about to embark on a similar project, to replace my mom's iMac 7.1 HDD with a brand new SSD disk. Before I bumped into this page here on IFIXIT, I came across this guide: Changing-an-iMacs-HDD

Apparently, re-glueing the thermal sensor connector on a new disk should be doable, although Instructables website above referred to an HDD, not an SSD. Most probably because SSD's where not popular at that time (the guide is from 2010).

This is the part where the sensor is connected again, using a thermal compound: Instructables - Reconnecting

Can those operations be repeated on a SSD drive? Were the thermal sensors (mentioned in the comments before mine) left hanging around for a specific reason?



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Please tell us which one of these systems is yours: iMac 7,1 systems


Depending on your system you may need a different solution.


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Your between a rock and a hard place here! If you have either the 20" or the 24" system.

The HD in these systems are a 3.5" SATA II (3.0 Gb/s) drive. The optical drives are PATA which is still slower! Most SSD's today are SATA III (6.0 Gb/s) and many are fixed speed and don't run well in older systems. You'll need to find a SSD that is able to be altered to the slower SATA speed or have the ability to auto set to the slower speed.

In the newer systems which have a SATA optical drive I often recommend just getting the dual drive upgrade kit which replaces the optical drive and then putting the SSD into it. In this case the sllloooowww PATA port makes this a no go. So then you have to swap out the HD so you gain the higher SATA port speed. But then you end up throwing away the deeper storage of the HD. A SSD with equal size is quite expensive! And given the age of this system I don't think its worth doing.

How about taking a 1/2 step here instead? What I recommend you do is replace your current HD with a SSHD hybrid drive. Here's the drive you'll need: Seagate Desktop SSHD. I recommend sticking with the 1 TB drive as being a good fit.

Here we are swapping out the 3.5" drive for a newer faster 3.5" drive which has the deep storage of a traditional HD but the speed of a SSD for booting and loading your more active apps.

If you decide to go with a 2.5" SSD you'll need to get a 2.5" to 3.5" frame to hold your SSD so it can be mounted in your system.

Lastly, review this IFIXIT guide: iMac Intel 24" EMC 2134 and 2211 Hard Drive Replacement If you jump down to Step 20 thru Step 22 it shows the steps to remount the external thermal sensor. And you do need to re-attach the thermal sensor.

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Dear Dan, thank you for your notes. The iMac 7.1 that I am referring to is a 20", Intel Core 2 Duo, 2 GHz, 800 MHz bus speed computer which originally came with 1 Gb of RAM (now has 4 Gb). Selecting among the four models that you mentioned in your comment, here it is:

Indeed, it has a 250 Gb, 7200 rpm HDD. However, my mom has only 40 Gb worth of data in it, so expanding size is not an issue and even a 120 Gb SSD would suit her case. It's an old machine, you are right, but she is not exactly willing to spend money on a new Mac, if I can get this going again (damaged blocks on the current HDD make it terribly slow).

From a system report, it looks as if the SATA speed is indeed 3 Gb/s as you mention in your answer. Luckily, the SAMSUNG SSD 850 EVO (120 Gb) is reported as compatible with speeds 3 Gb/s and 1.5 Gb/s.

Thank you for opening my eyes on the risk.



Here is the correct guide for your system: Mac Intel 20" EMC 2133 and 2210 Hard Drive Replacement. Don't forget the adapter frame to hold the SSD you don't need anything fancy a simple sheet metal one will do. Glue the thermal sensor down on the metal part of the SSD case near the connector area which gets a bit warm. Your mom's system should really zip!


Thank you Dan! Will follow that guide indeed. One minor question on the suction cups: do they need to be small and used at two opposite corners? One suction cup at a department store, for heavy duty, costs me 4€, whereas the geek-fixer type comes at 15€/pair plus shipping. The answer might depend on how strong the glass is and how strong the magnets are 8-).


You risk breaking the cover glass. Best to use two, one in each corner. You should get the clamp type like what IFIXIT sells. They have more suction.


Thank you Dan. I just found out that the small suction cups that came with my LED mini spots (GU10 size) work well.



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