Hi, I have tried to share internet from iMac to my new macbook via Airport on that imac. I did all necesary steps and everything worked fine for like 2days. But unfortunately something happend , and I still dont know what , but its not working now. I can access that macbook from imac (all files, folders, even screensharing) but I cant get internet there. The most important thing I find is this system.log messages (they appears in log everytime i try to access imac's wifi network) . Aug 3 17:58:11 Macintosh bootpd2313: DHCP DISCOVER en1: 0,31:30:2e:30:2e:32:2e:31 Aug 3 17:58:11 Macintosh bootpd2313: bootp_session_transmit: bpf_write(en1) failed: Permission denied (13) Aug 3 17:58:11 Macintosh bootpd2313: transmit failed, Permission denied So I guess the question is: Why is iMac refusing to assign IP address to macbook ??