Apple today released a new version of Mail for OS X Yosemite, fixing an issue that could prevent users from composing a message. The update is available to all developers with the Yosemite Developer Preview installed, as well as public beta testers.
The software can be downloaded through the software update function of the Mac App Store.
OS X Yosemite brings several new features to the operating system, including Continuity, which offers unprecedented integration between iOS and OS X. The operating system also includes a complete visual overhaul with a flatter iOS 7-style look.
Article Link: Apple Releases OS X Yosemite Mail Update for Developers and Public Beta Testers