I've just bought a new Mac Mini, hoping to do some iPhone SDK development. I've had a few struggles with it so far, but by far the biggest trouble is that it randomly drops off the internet every half hour or so. Now at first I thought this was a wireless router issue, but the exact same behaviour appears regardless if I'm connecting with a wireless or wired connection. It's very strange. Some apps (Firefox, Safari) complain they can't connect to the internet anymore, while other apps work just fine. Digging a bit deeper, it looks like a DNS problem of some sort. I can connect to a server by IP address, but the DNS lookup seems to be failing for some apps. However, the DNS servers I'm connecting to seem to be working just fine for other Windows machines, or even for nslookup in the terminal. For example: Trevors-Mac-mini:~ trevor$ ping webmail.shaw.ca ping: cannot resolve webmail.shaw.ca: Unknown host Trevors-Mac-mini:~ trevor$ nslookup webmail.shaw.ca Server: 126.96.36.199 Address: 188.8.131.52#53 Non-authoritative answer: Name: webmail.shaw.ca Address: 184.108.40.206 Trevors-Mac-mini:~ trevor$ ping 220.127.116.11 PING 18.104.22.168 (22.214.171.124): 56 data bytes 64 bytes from 126.96.36.199: icmp_seq=0 ttl=121 time=28.879 ms 64 bytes from 188.8.131.52: icmp_seq=1 ttl=121 time=26.769 ms ^C --- 184.108.40.206 ping statistics --- 2 packets transmitted, 2 packets received, 0.0% packet loss round-trip min/avg/max/stddev = 26.769/27.824/28.879/1.055 ms Trevors-Mac-mini:~ trevor$ ping webmail.shaw.ca ping: cannot resolve webmail.shaw.ca: Unknown host Trevors-Mac-mini:~ trevor$ This has led me to a bit of frustration. A simple fix is to unplug and replug in the Cat5e cable in the back, but I'd rather not do that every half hour. Does anyone here know what might be going wrong? Thanks in advance!