It seems that the Sticks 'drop off the network' within a short period of time-not sure what that period is, but no longer than a couple of hours. If I reboot the Sticks, they are pingable, they can be seen on the network, and adbLink connects to them no problem-but only for a while. adbLink simply isn't seeing them on the network. ' I've done some troubleshooting and it seems that this is being caused by the simple fact that the 4K Sticks sometimes do not respond to ICMP pings-i.e. I'm able to connect to them sometimes, but often I'll get a message 'Cannot connect to. I'm having some weird connection issues to the two FireTV sticks periodically (not always, but usually) using adbLink 3.8. I just wanted to see if you have any suggestions. However, I've ditched those in favour of two of the new 4K Fire TV Sticks, and I'm running into a strange connection issue while using adblink 3.8 on my 2011 Macbook Pro running High Sierra. I've run adblink 3.8 with no problems to connect to my FireTV 2nd gen for a long time (and other FireTV devices and adblink versions before that).