How to set up wireless bridge on same subnet?

Solution 1:

I've had the same question, but from the other point of view. I wasn't aware of ifconfig (kinda new to this stuff). I think I got it working by doing it the other way round. I first had OS X share my internet over wifi (via sharing preferences) Then with ifconfig, you'll see that OS X creates a bridge100 (or something) I set the IP manually like you did on that bridge and then I add my network connection supplying the internet access.

Not entirely sure whether it works perfectly, at first glance, everything works OK, but who knows....