How to share your "1 device only wi-fi connection" using an android device, a mac and a usb cable.

1. MAC: install HoRNDIS (http://joshuawise.com/horndis) (only once)

2. MAC: make sure that wifi is enabled but not connected to any network (might not be necessary, not sure)

3. Connect Android<-usb->MAC

4. Android: enable USB tethering

5. MAC: .enable internet sharing (sys pref->sharing)

         share from "your android device" to computers using Wi-Fi (or/and Bluetooth PAN)

         .set Wi-Fi options: security