Lots of confusion on this issue, it seems at least for me. I've had two separate chats with apple sales where they insist the the memory is NOT upgradable, one going so far as to say it would be "tampering" even if possible and that would void my warranty. Neither of them could answer if the base configuration was one 8GB stick with an open slot or 2 4GB sticks, one in each slot. One of them said I could assume both were full since it wasn't upgradable.
I already got an email, as I'm sure many of you have, from OWC pitching memory upgrade preorders and trade-in for stock memory modules.
I'm not sure if this is completely inconsistent with what is being discussed here, Apple probably is being intentionally vague and discouraging since they would rather sell you above market priced memory now and memory vendors would like to sell you their stuff....
It would be nice to clarify:
1. If opening up the bottom of the mac mini does indeed void the warranty.
2. Is the stock 8GB configuration one stick or two.
3. How hard is it to actually do the swap.
Time will tell, I'll have to be patient a bit yet, keep my eyes open and be glad there is at least something to discuss!!
Been waiting a while to upgrade my 2011 Mini.