I'm running virtual Win7 under Parallels 10.4.0 in El Capitan 10.11.6
- I've configured the virtual machine to open email [mailto:] links in Mac (Top pic).
- I can configure the Mac Mail preferences to open email links with Outlook for Mac 15.24 (middle pic),
- but no matter what I do Mac Mail preference keeps reverting to open mail with "Parallels Desktop.app." (bottom pic)