(The update is rolling out now, it may take some time to propagate across all App Store regions)
Pixelmator for Mac today updated to version 3.6 optimized for macOS Sierra and the new MacBook Pro Touch Bar, as well as a handful of other enhancements for the photo editor. Pixelmator 3.6 includes support for the latest macOS Sierra APIs, like Universal Clipboard and Tabs. Tabs enable users to edit multiple Pixelmator documents in a single window. As promised at the Apple event, this update brings a contextual row of Pixelmator editing tools into the Touch Bar present in the new MacBook Pros.
The update also includes new ways to make selections, including a content-aware Smart Refine, a live preview Quick Selection, wide color image support, and more.