Instant Hotspot makes using your iOS 8+ iPhone for network connectivity as easy as connecting to a Wi-Fi network.Handoff lets you start an activity on one device and pass it to another OS X 10.10 or iOS 8+ device.Mail handles large attachments more intuitively, allows PDF annotating, and includes Mail Drop for quick emailing of messages with attachments, where the attachments get encrypted in iCloud instead of sent via email.Safari updated, UI simplified, default search changed to Bing from Google, added Private Browsing mode and DuckDuckGo search.Also, has a Windows and Web-based interface iCloud Drive adds Apple-branded Finder-integrated cloud storage, similar to DropBox and Google Drive.Today view in Notification Center - provides a single location for all of the current day's events and items.
OS X version 10.10, also known as " Yosemite", is the eleventh major release of OS X, Apple Inc's desktop and server operating system for Mac computers.