Hi
I am trying to run Chirp on my Mac to use with the Baofeng UV-R5, but having some difficulties connecting to 2. When it read from the radio in clone I get a error message : Radio did not respond.  I have installed it on a windows machine and it works just fine so I am doing something wrong on the Mac.
Any help would be greatly appreciated.

Mac book Air
Software                OS X 10.8.4 (12E55)
Drivers installed   OSX Installer to PL2303 Serial-USB on OSX Lion
Chirp 0.3.1