Model A1419 / EMC 3070 / Mid 2017 / 3.4, 3.5 or 3.8 GHz Core i5 or 4.2 GHz Core i7 Kaby Lake Processor (ID iMac18,3) / Retina 5K display. Refer to the older iMac Intel 27" Retina 5K Display (Late 2014 & 2015) guides as the system is very similar.

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No action with the apple memory installed

I have just bought a crucial 32gb memory kit for my Mac and have been trying to install it with no avail. Then i go back to just the apple memory and still no action. Any suggestions?

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Sounds like you didn't insert the models in correctly. There is a left and right side and you do need to fully seat them once you get the orientation correct.

Review these two Apple T/N's

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As far as i know i have them inserted right. I finally got the apple ones to work but not the new ones and as far as i know it is compatible with this Mac

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Are you using and purchased the right memory?

iMac (Retina 5K, 27-inch, 2017)

Get memory specifications for iMac (Retina 5K, 27-inch, 2017), then learn how to install memory in this model.

Memory specifications

This iMac model feature Synchronous Dynamic Random-Access Memory (SDRAM) slots near the bottom of the computer with these memory specifications:

Number of memory slots 4

Base memory 8GB (2 x 4GB DIMMs)

Maximum memory 64GB (4 x 16GB DIMMs)

Use Small Outline Dual Inline Memory Modules (SO-DIMM) that meet all of these criteria:

PC4-2400 (19200)

Unbuffered

Nonparity

260-pin

2400MHz DDR4 SDRAM

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Carl Schlabach will be eternally grateful.
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