On your terminal window, type: ifconfig
You should get something like this:
ifconfig
eth1 Link encap:Ethernet HWaddr 90:A2:DA:F8:0A:22
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:4
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:96 errors:0 dropped:0 overruns:0 frame:0
TX packets:96 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:6528 (6.3 KiB) TX bytes:6528 (6.3 KiB)
wlan0 Link encap:Ethernet HWaddr 90:A2:DA:F8:0A:22
inet addr:192.168.240.1 Bcast:192.168.240.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:16 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:3263 (3.1 KiB)
Do the same on your Mac. Please post the results of both.
Thanks
Jesse