The biggest problem with Office 2011 and El Capitan are hangs or crashes during account syncing. Microsoft is aware of this problem which it describes as: Shortly after you start Microsoft Outlook for Mac 2011 on Mac OS X El Capitan (version 10.11), Outlook hangs when it tries to sync with the server.This course is available 24 hours a day, 7 days a week. Explore intermediate formatting and them..