I found the same issue (I think) after installing Mint Debian 201012 to my Macbook.
The wireless hardware was not detected, leaving only lo and eth1.
In Synaptic, you will find (firmware) drivers for Broadcom. I found a few of them, and chose to
either upgrade them, or install them (as I was not sure which was my hardware since
the system did not detect it on install). This will teach me to get System Profile Info while using the Mac,
and yes (shame on me), it's a dual-boot machine, so I could have used System Profiler to get exact hardware specs.
So, of course, I had to connect...somehow. I wound up taking out an Ethernet cable
and connecting it to my router and after that I was able to get the Broadcom firmware
updates/installs and from there I was good-to-go. http://nylinuxhelp.com/blogs/macbook/fix-wifi-mint-debian-on-macbook/
Hope this helps,