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Model A1418 / Late 2013 / 2.7 & 2.9 GHz Core i5 or 3.1 GHz Core i7 Processor

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Replacing HD for SSD

Hey - I’m looking at replacing the 1TB HD in my EMC2638/A1418 iMac (i7) with a faster SSD. I have openend up loads of iMacs for various reasons so I know how hard it is and how careful you need to be.

I have recently replaced the HDs in a few Mac Book Pros and I used Hynix SL300/SL308 500GB for this and they have been great. I plan to put the same drive into the iMac however I am unsure if I will need a temperature sensor? I did not need one for the mac Book Pros (fans run normally) - do i definitely need one for the imac? also do i need to setup TRIM? I seem to recall reading somewhere that the Hynix drive doesn’t need it. Thanks!

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that you will not need the thermal sensor adapter on this machine:

https://eshop.macsales.com/upgrades/imac... appears

iMac Intel 21.5" EMC 2638 Hard Drive Replacement

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It is already a 2.5 inch form factor, so swapping in a 2.5 inch SSD is reasonably easy, once you get all the adhesive separated with the plastic pizza cutter wheel, and carefully remove the lcd/screen combo. If you break this assembly, replacements are currently only available from China directly, and are expensive. I would really consider a thunderbolt external drive instead.

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Hey Alex!

Kinda late but if it helps..


I performed the HDD - SSD change recently in the i5 2.9 Ghz model and I didn’t need the thermal sensor. I placed a Samsung EVO 860 500GB and also upgraded the RAM to 16gb, it’s a new machine. I’ll try the PCIe Nvme SSD storage option soon, we’ll see how it goes/ if it’s worth it.

I know you mentioned that you’ve opened up macs before but still, be careful. Other than that it’s not that difficult, just follow the macsales youtube tutorial and you’ll be fine.

Good luck!

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I bought a Sandisk 240GB SSD Plus and I hope it works. Others on Mac Forums scream thermal sensor yet every you tube video I watched for the 2013 models nobody put a thermal sensor in.

I'll be doing mine next week and could REALLY use some reassurance that the fans wont scream after I put it back together.

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Most of the iMacs I have upgraded did not need a special cable or sensor. The few that did were just as easy to install the fan control program and that fixes even those ones.

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I think the older model 27" iMacs were the ones that actually need it as on OWC they sell the sensors for 2012-Newer 27" iMac. I looked for the 2013 iMac 21.5" and nothing.

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I bought a Sandisk 240GB SSD Plus and I hope it works. Others on Mac Forums scream thermal sensor yet every you tube video I watched for the 2013 models nobody put a thermal sensor in.

I'll be doing mine next week and could REALLY use some reassurance that the fans wont scream after I put it back together.

There was one video where this guy debunks the myth of needing one for a 2011 27" model but he just snipped two wires going to the SSD but said the OWC sensor basically bypasses those two wires because it only has 5 wires on the harness they send you instead of 7 so you can pay $50.00 for the sensor that senses NOTHING. lol

This is why I believe the YouTube video.

https://eshop.macsales.com/item/OWC/DIDI... everywhere I search it says for 27" iMac 2012-Later. I know older models had them too but.

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Hey Danny

Well I have an iMac 2013 21.5", changed the HD for a Samsung EVO 860 and there was no need for a thermal sensor, everything worked great (I later upgraded to a PCIe SSD).

You may know this but just be careful while handling your machine, take your time.

I find this video to be really helpful: https://youtu.be/VT6u5KURpC0

Good luck

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