Hi there, help needed,
Running High Sierra 10.13.2 on our Mac Mini, iMac and my Macbook Pro. The Mac Mini is used "headless" to serve music via SPDIF to the SuperNait DAC.
We were happily controlling the Mini using the in-built OSX screen sharing via WiFi. It started to get flakey, requiring toggling WiFi on/off and/or restarting the Mini to get it to show up as an option in the Finder Sidebar on the Macbook. Eventually it stopped showing up at all.
I updated all OSs, thinking a compatibility issue. No dice.
Been through Apple support and they got me to try everything I'd already tried. No luck.
1. All computers are on the same WiFi netowrk
2. All computers are logged into the same iTunes account and AppleID.
3. Users are all "Admin" level and all permissions set to allow screen sharing
I've also tried going direct to the Mini's IP address, (Using Go>>Connect to Server in Finder) but it can't find it that way either.
A router reset fixed it once for a short while but that doesn't fix it any more. Basically the Mini just refuses to show up as a computer connected to the network. Even though is definitely a computer connected to the network.
I'm at my wits end.
(We also used to be able to control iTunes on the Mini using the "Remote" App on iPhones and iPads, but the library has disappeared as an option there too.)