Hi I've been having this problem since i reinstalled OSX on my macbook air. I am running OSX 10.7.4 Whenever i try to ping my pc (named danni-pc) from my mac i get this error: Same result with 'danni-pc.local' If i ping my linux server, "digis", it works fine-ish - i have to put .local at the end of the hostname for it to work, but i guess i can live with that: The mac can ping itself by using 'danniair.local'. I can ping danni-pc from my server (digis) and the other way around without any problems. I can also ping the mac (danniair) from danni-pc. If I use IP-adresses instead of hostnames it works fine in all cases. I have tried to enable windows sharing on the mac under 'Sharing', and checked the "Share files and folders using SMB (Windows)" box. When I go to network settings on the mac, it states that it is connected to my wireless network and has the ip 10.0.0.149. I don't know what to try next. Any help would be greatly appreciated!