Update: The guide linked below uses some pictures from the 2014 Mac mini model, and though they are apparently similar to the 2018 in many ways, those looking to do their own upgrades will be better served by waiting for an official guide from iFixit.
Glad as we all are to see Apple didn’t solder the RAM to the motherboard in its latest Mac mini update, the process still isn’t as simple as in days of yore. Rod Bland has posted a guide on iFixit detailing the process, which requires a few specialized tools.
I’ve upgraded Mac minis in the past, and while everything is friendlier than the first models, which famously required a putty knife to open, this is yet another reminder that the days of easily upgradable computers are waning. It’ll be interesting to see what the company’s forthcoming Mac Pro looks like in this department.