Chosen Solution

Is it still possible to upgrade the RAM myself (without taking apart the Mac)? 27" Mid-2017 iMac? Or have they switched to the same design as the new Mac mini. From what I can see on the photos the RAM is still accessible via the back door. Anyone able to confirm this?

Hi all. Apples website has been updated and shows how to replace RAM in iMac mid-2017, and yes it is possible. https://support.apple.com/en-ie/HT201191

You can upgrade by yourself , really easy. Here you have the IFixit guide

The mid 2017 27" iMac (non-pro model) specs state: “2400MHz DDR4 memory; four SO-DIMM slots, user accessible” (source: https://www.apple.com/imac/specs/)