This document provides a solution for when the Parallels application for Mac OSX works on wired connections but fails for wireless DHCP access.
1. In your Parallels configuration, set the network adapter to Host-only networking .
2. In OSX go to Applications > System Preferences > Sharing and choose Internet . Choose to Share your connection from: Airport To computers using: Ethernet Adaptor (en2) . en2 is the virtuals adaptor. Click Start . It will give you a warning, Are you sure that you want to turn this on ? Click, Yes . After clicking, Yes, your Start button will switch to Stop.