I have an office of Mac users with Office 365 and Outlook. When I test Desktop Email Encryption on a Windows machine the interface is nice and clean. The install works with no issues and things like a plugin for outlook are installed.
Please consider adding these features to Mac OS Desktop Encryption product.
1. MAPI / Exchange Compatibility. Lets face it using IMAP or POP does not have the same functions as a direct integration with the exchange protocol like the calendar features etc.. Please consider in the next release allowing Mac Users to use the exchange protocol.
2. Outlook Plugin. There is no standard plugin for Outlook on a MAC. This means my users have to do something odd or I have to write some code in RibbonX so the key server can make a decision on it. This would go a long way for my users having the same encrypt and sign button in their outlook.