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Model A1418 / Late 2012 / 2.7 & 2.9 GHz Core i5 or 3.1 GHz Core i7 Processor

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Put in a new blade SSD in it and it gave me a black screen!

I put a PCIe blade SSD in it and it worked, what happened is that it gave me a black screen problem after I put it in.

The system starts normally it is just that the screen is black you can even see the apple starting.

I put the PCIe and the system started with Catalina but at the time of restarting to install Monterey it gave me that problem.

Update (08/11/2022)

@danj so this port cannot be used with this ssd and with a hdd at the same time

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No, thats not what I'm saying! Both can be populated with the correct drives! But thats the rub! Make sure you have the correct drive installed. If the image is the drive you are using it should be just fine! Samasung 128GB MZ-DPC128T/0A2

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Yes! The Late 2012 21.5" iMac A1418 Custom Apple blade SSD is not PCIe/NVMe it is a custom mSATA implementation.

So its not surprising you are encountering issues with a PCIe/NVMe drive. Here more info The Ultimate Guide to Apple’s Proprietary SSDs

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francis sera éternellement reconnaissant.
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