I have been using Nuance Dragon Naturally Speaking running on my Mac with Parallels running Windows 7 and more recently Windows 8 for several years. WARNING: Latest update to Parallels 8, namely 8.0.18305 dated October 25, 2012 shuts down Dragon Naturally Speaking, apparently due to some conflict between the 2 programs. I did find a solution to the problem. This was to uninstall Parallels 8.0.18305 and then install an earlier Parallels version, namely 8.0.18100, which does support Dragon 11.5. Took me 5 days to figure this out. You can easily delete the newest Parallels version after install by dragging the app to trash. The hard part is finding dmg file for 8.0.18100, which I was able to locate on my computer under downloads. Then you must find your activation code, which hopefully you have saved. I post this to help those who suddenly find DNS no longer working. May your resolution be easier than mine.