Of particular interest to me are:
- Vibrant Interface — We adjusted the OmniFocus interface to fit better in OS X Yosemite. That included making new toolbar icons, adjusting the appearance of some other elements, and incorporating vibrancy where appropriate.
- Extensions — OmniFocus for Mac now has Today and Share extensions, just like on iOS. To enable to Today extension, click Edit at the bottom of Notification Center.
- Sharing — In addition to accepting content from other apps, actions can be shared from OmniFocus using the share button in the toolbar.
- Grouping Actions in Quick Entry — The app no longer hangs when grouping actions in the Quick Entry window.
Also, the interface feels overall to be snappier. If I change some parameter that moves a task around the database, it makes that move quickly.