Which SSD should I buy, PCIe or mSATA, on iMac EMC 2638 (Late 2013)?

Mind telling why the SSD that's built for a Mac by OWC, that works, is not for you? Instead you want to put in a module built for a PC that doesn't work reliably with a Mac. Now you're talking to someone that fits the adage "If you can't dazzle them with brilliance, baffle them with BS".

if the 21.5-Inch "Late 2012" or "Early 2013" iMac models were configured with an SSD or a "Fusion Drive" at the time of purchase, the SSD module is connected via a dedicated PCIe connector and another SSD can be installed in its place. Unfortunately, if the system only was configured with a hard drive, the needed connector is not present on the motherboard and there is not a way to add a PCIe-based "blade" SSD afterwards.

http://www.everymac.com/systems/apple/im...

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Or...

Go with the Apple SSD like this one: Apple Original blade SSD - 128GB iMac 21.5"/27" Which is what I would do. But! you need to have the model that offers the blade SSD connection! Otherwise, you only have a single drive system.

由 Dan 完成的 2017年7月27日

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Sorry the mSATA drive uses a different connection than the adapter you listed offers, it won't work at all. — Dan
Or...

Go with the Apple SSD like this one: Apple Original blade SSD - 128GB iMac 21.5"/27" Which is what I would do. But! you need to have the model that offers the blade SSD connection! Otherwise, you only have a single drive system. — Dan

Abraham Armada @macarmada 声誉积分: 13 3 1 1 · Answer 1 · 2017-12-16T17:53:02-07:00

Abraham Armada @macarmada

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发帖于: 2017年12月16日

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iMac A2638 (Late 2013) uses PCIe Blade SSD and iMac A2544 (Early 2013) uses mSATA Blade SSD

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While you got the dialog correct you forgot the physical interface is unique to Apple. M.2 drives won't work.

由 Dan 完成的 2017年12月17日

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Wile CKoyote @wileckoyote 声誉积分: 1 · Answer 2 · 2020-02-11T07:17:08-07:00

To finish the story. You need an adapter for the proprietary M2 connector, which you can find on several places on the net, just google.

BUT :

If your iMac came without Fusion Drive then the M2 slot on the PCB is not enabled in Mac SMC (sort of Bios for PC’s ). So far I have not found a way to enable it and I do have searched a lot of fora.

My machine is a late 2013 21.5 that came with a regular 1TByte Hard disk. The M2 slot remains disabled. I tried using a connector that was said to be working for some in combination with a Crucial P1 1Tbyte nvme.

In the end I replaced the original (very slow) HD with a SATA Crucial 1Tbyte mx serries SSD and upgraded ram to 16Gbyte and it is flying ever since like better than new. Wishing I had not gone through all the trouble.

iMac Intel 21.5" EMC 2638 & EMC 2742 Late 2013

Which SSD should I buy, PCIe or mSATA, on iMac EMC 2638 (Late 2013)?

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