Rick, you reminded me of the other reason why I eventually returned to the purchase of a windows machine. The first reason was that 80% or more of my work was done on the windows portion of my Mac.
Secondly, the reason you reminded me of was that even though I crammed a buttload of Ram on my mac, I was only able to use/borrow 2mb of it to run Xactimate on Parallels. Putting these two together, it only made sense for me to just go back to an all inclusive windows machine for half the price of a Mac with equivalent specs. Im now running Xactimate with 100% of my ram.
If you surf the net on your windows side, you will need to get antivirus. Mac does not change anything windows does as it operates independently of Mac and is still a windows OS. If all of your web browsing is done on the Mac, side then you won't need it. A slight drawback is that many CMS programs used by IA firms are not compatible with Mac's web browsing softwares, so you will still need to use Windows explorer on the Windows side.
I too have tried VMWare and Parallels, but prefer Parallels. VMware may work better (I did not notice a big difference bt performance), but VM Ware kept resetting my registration with MSB Integriclaim. I wouldn't use VMware unless you know beyond any shadow of doubt that you will not need anything other than Xactimate.
I had the same experience with Xactimate regarding help desk issues- the solution is just to keep yo mouth shut. The good news here is that the Mac will never be the source of the problem. Your only issues with Xactimate will be with the bugs that Xactimate still hasn't worked out and with the historically glitch-prone Windows.