I have a friend who hasa Mac that suddenly can not resolve domain names and thus is unable to browse the internet. I'm a PC tech but I reluctantly agreed to help as I know little about Mac's. That being said I dove in and found that his machine is on a wireless LAN and can ping the Acess Point and other PC's on the LAN (one Mac and one XP machine). I then tried to ping external websites using doamin names with no success. I then did the same ping test but this time I used IP addresses and the test was successful. The problem Mac has a DHCP issued IP address and is using the Access Point as its DNS server. All other PC's on the LAN are using the same settings (different IP's) and are working with out any problem. I tried to add a diffent DNS server hower it will not retain the address. Anyone have a starting point I can check?