Has anyone experienced a Mac suddenly disappearing off their network?
I have a mid 2011 Mac mini sever (OS X 10.12.6 Sierra), primarily used as a Plex server. It is directly connected to an Airport base station. In the past it has occasionally disappeared from ‘locations’ on the finder on my MB), though a force quit of finder has resolved this. I thought this might have been due to the MBP being on different networks at times.
I have Screens 4 installed for remote connections, and similarly have not been able to connect when the Mac mini disappears from the finder.
I can still access the Plex server (i.e. play files on another device) when unable to connect directly to the machine.
I have had to shutdown (hold the power button down) the Mac mini to resolve this the over the last couple days (it shows up in the finder afterwards, and I can connect).
[I did not update the mini as it has run fine under Sierra.]