I am developing iPhone and also Android applications in Apple MacBook. I want to develop Blackberry application. I am using Windows to learn for now.
Is there any software or Eclipse plugin to develop BlackBerry applications on Mac OS instead of Windows?
Unfortunately the current version of the Eclipse plug-in only supports OS6 and you must have a physical device connected to the computer. I've been using Parallels to run Windows XP on my Macbook Pro and am pretty pleased.
You may find something interesting/useful by looking at this question: installing BlackBerry Eclipse JDE plugin on Mac OS X
I am a fan of using parallels. It can run in coherence mode and also skin windows to look like your mac. I use parallels and an eclipse windows plugin.