Sharing, File Sharing and turned ON File Sharing (the machines vanished), then I turned OFF File Sharing (they stayed vanished). It wasn't until days later at home I noticed the ghost machines still in Finder with no way to delete them. Sharing, File Sharing before connecting. A little later I woke my laptop at a hotel, and knowing there was a network I didn't trust, I turned off Apple / Preferences. During this time, I closed my laptop and it went to sleep - remembering that it had shares. Their machine, rightly so, showed up in my Finder shares. and more importantly, what caused it.Ī friend came over and connected to my network while I was using my machine.