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A1418 / EMC 3069 / 2017 / 3.0 GHz quad-core i5, 3.4 GHz quad-core i5 또는 3.6 GHz quad-core i7 프로세서. 2017년 6월 8일 출시.

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SSD incompatible with iMac Retina?

I recently tried to replace the internal hard drive with a 1TB Crucial MX500 SSD but the iMac doesn’t recognise it when it’s connected internally. It doesn’t come up in Disk Utility at all. iMac is an 18,2 Retina 4k

The original HDD still works when I connect it internally, so I know the cable isn’t broken. The new drive works fine in an external enclosure, so I know the drive is working.

I plugged in an SSD from a different Mac and it works fine internally. Just not this new one, I bought the drive specifically from a Mac upgrade kit, so I assumed it should be compatible?

Am I missing a setting for it? Firmware? Is there some kind of voltage incompatibility? I noticed the original drive is 5V 1.6A, the new SSD I have is 5V 1.7A. Could .1amp cause issues?

Any help is appreciated, I’m going to buy another new SSD with a smaller capacity and see if that works

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What is your exact model? There are some issues you might be facing depending on the explicit model. Plug in your systems S/N inter here EveryMac - Lookup. To find your S/N flip over your system looking at the foot for a sticker which has it. Let us know what you have.

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@danj It's A1418 EMC3069 MNDY2LL/A

No fusion drive, it just had a 1TB HDD in it

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I bought another SSD, Crucial BX500, 960GB and it works perfectly!

So, not sure what the actual cause was, but the MX500 1TB just wasn’t compatible

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@tharaka - Happy to hear its working!

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If you had a Fusion Drive'd iMac you first need to break the Fusion drive set Split Your Fusion Drive Apart

As we don’t know which iMac you have you might have one that is using the older HFS+ file system and your new drive maybe setup with APFS. You will need to re-install the OS from Internet recovery or if you already have setup a Bootable OS installer with it (see note below!). Restart your mac pressing the Command (⌘) and R keys to enter into it. Make sure you’ve got a good connection to the internet.

Reference: Mac startup key combinations

Outdated image files

If you have or plan to setup a bootable OS installer be aware Apple failed to maintain the certificates with the posted OS installer images If you've got an old macOS install image, it will probably stop working today Here’s the updated file images:

Jump to Step4 to find the image URL’s in all three.

If you are using anything older you’ll need to cheat! As Apple did not update them ;-{ You’ll need to back date your system to be within the macOS’s window

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Thank you for posting this!

I've encountered SEVERAL cases in my shop where the Crucial MX500 SSDs in particular do not play nice with the 2012-2020 21.5in and 27in iMacs.

The drives will appear some of the time, and work perfectly some of the time, but then give random question mark folders which will resolve on their own.

I've also seen massive amounts of lag in our Arch Linux test environment with MX500s installed. (And yes, this is AFTER removing the faulty SSUBX/SSUAX drive that might have been there as part of a Fusion volume.)

I have NO idea why that's the case, but it's been consistent enough that we now only install WD and Samsung SSDs in this era of iMac since they're such a pain to open up once you've installed aftermarket seals.

I would recommend AGAINST using BX-series Crucial drives in these systems, too, because they sacrifice speed and useful lifespan for cost and, again, it's a pain to get into and out of these and you risk breaking the screen, so investing a bit more for a high quality, high-lifespan drive would be wiser than going with a budget unit.

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tharaka 영원히 감사할 것입니다.
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