While visiting an apple store today (Feb 20, 2019) I was informed the macmini RAM is soldered to the Motherboard.
Is macmini 2018 indeed RAM upgradable?
Cheers
You will only void your memory if you mess something up.
Here is how to replace the RAM
https://www.ifixit.com/Guide/Mac+mini+Late+2018+Memory+(RAM)+Replacement/115309
It is comparable to replacing/adding a drive in the upper bay of the 2012 Mac Mini
From Apple: “Mac mini (2018) does not have user-installable RAM. You can configure the memory in your Mac mini (2018) when you purchase it. To upgrade the memory in your Mac mini (2018), go to an Apple Store or Apple Authorized Service Provider.”
If you DIY, you’ll void the warranty.
crusial who sell and test their modules with a wide range of computers list modules compatible with it https://eu.crucial.com/eur/en/compatible-upgrade-for/Apple/mac-mini-(2018)
The warranty will be voided irrespective. And that’s for the entire machine, not the memory alone. Proceed with care.
RAM upgrade on Macmini 2018
