I haven't put a Mac on a network for several years now, and I don't remember it being difficult to map to a server, but I'm having an issue with one of the iMacs at the place I'm working at now. It's running 10.14.6 Mojave. No internet connectivity all of a sudden. Wireless showed a connection and ethernet showed a connection to the network. However, no internet. Tried copying a link to the NAS from one of the other iMacs but no luck - like I was Ethernet connected (green light on the Network system preference) but not on the network. Couldn't access the internet via wireless which was also a green light. Replaced DNS addresses with 8.8.8.8 & 8.8.4.4 to no avail. Finally pulled the Ethernet cable and was able to access internet via wireless. Doesn't really help with the network connection though as i need to be able to contact the NAS for files. Any ideas?