I use it regularly. As long as the servers you're connecting to are not on your local network, you shouldn't have any problem. If they are on your local network, the read me says (and I've noticed) that MacOS often uses AppleTalk instead of TCP/IP. You have to Connect manually with PGPnet beforehand and type the IP address in the "Server IP Address" button dialog if you want it to use TCP/IP with PGPnet over your local AppleTalk network.