I thought it worth posting my experience of this setup.

I have used Visual Micro/Atmel Studio for some time under Win7 on a PC.  Installation and configuration was quite a challenge I remember,  particularly the Jungo/LibUSB driver issue.  

I made the decision recently to move to an iMac and installed Parallels to run Win7 as a virtual machine.   I didn't expect installation and configuration of Arduino IDE and Visual Micro/Atmel Studio to go smoothly but how wrong I was.

Installation from scratch was a breeze and I had it all up and running in about 15 minutes including configuration of the LibUSB driver to run alongside Jungo.  It works like a dream and is much faster than my old Windows PC.  Compiling and uploading work fine using USB serial interface/bootloader as well as via an AVRISP.  Tools device programming and bootloader programming also work flawlessly.  I'm impressed and very pleased.  

Hopefully this information will help anyone else considering doing the same thing

One final thing, the iMac 27" Retina display makes the Atmel Studio IDE very easy to use.  There is so much screen space and it's much less tiring on the eyes.