Advertisements Perhaps that's just wishful thinking. The Unix underpinnings of OS X can help a great deal in diagnosing problems like this, but you must learn more about them. I can only point you in a general direction, since I have no way to replicate your exact environment. The following may seem like basic information for "hackers", but since you didn't do it I assume you're not familiar with it. You can examine IP packets sent/received at any interface by using the command line program "tcpdump". You run this using a command line interface called "terminal". You can usually start terminal by searching for that word in spotlight. It should be the "Top Hit". Unfortunately tcpdump is a complex program for those unfamiliar with it. I assume you are unfamiliar because if you were familiar you would already be using it. In order for tcpdump to know what to do, it must know what "interface" to use. Your wireless connection uses one interface, your wired ethernet uses another. You can find out the names of the interfaces on your computer by issuing the command (in terminal): ifconfig On my 3 y/o iMac this command produces (partial output): Code: en1: flags=8823<UP,BROADCAST,SMART,SIMPLEX,MULTICAST> mtu 1500 ether 00:1c:b3:72:b2:d7 media: autoselect (<unknown type>) status: inactive supported media: autoselect en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500 inet 192.168.17.80 netmask 0xffffff00 broadcast 192.168.17.255 ether 00:1b:63:95:1c:4f media: autoselect (100baseTX <half-duplex>) status: active supported media: autoselect 10baseT/UTP <half-duplex> 10baseT/UTP <full-duplex> 10baseT/UTP <full-duplex,hw-loopback> 10baseT/UTP <full-duplex,flow-control> 100baseTX <half-duplex> 100baseTX <full-duplex> 100baseTX <full-duplex,hw-loopback> 100baseTX <full-duplex,flow-control> 1000baseT <full-duplex> 1000baseT <full-duplex,hw-loopback> 1000baseT <full-duplex,flow-control> none The above may differ for the Mini. I don't know since I've never owned a mini. Once you have identified the two relevant interfaces you need to start two separate tcpdump sessions in parallel. You do this by opening two separate terminal windows. The commands for each will be similar. If you are already an administrator on your computer you can issue the tcpdump commands more easily. If not, then the easiest thing is to do all this from a user who has administrative privileges. sudo tcpdump -l -n -i en0sudo tcpdump -l -n -i en1 You will be prompted for your administrator password by the sudo command. The above will produce timestamped packet dumps for each interface. If your Mini is properly routing, you will see an IP packet arrive at an interface and very shortly later depart out of the other interface. The IP addresses will be re-written by the Mini, so it may be a little difficult to follow whats going on. Good luck.