I've read that iOS 9 and 10.11 will utilize iCloud Drive for syncing Notes, Calendar, Reminder, etc between Apple products instead of IMAP. And user will be prompted to convert these apps to new syncing method. Is it possible to sync Notes, Calendar, Reminder, etc between iPhone running iOS 9 and Mac running Mountain Lion? If not, will there be a way to sync these apps' contents? Thanks in advance.