Vellum and Sierra
Today Apple released macOS Sierra, the newest version of the Mac operating system.
Should you upgrade to macOS Sierra, you will need to use the latest version of Vellum, which contains crucial changes made for this version of macOS.
In Sierra, you’ll find a new way to manage your open Vellum documents: merge your windows into one and use tabs to seamlessly switch between them.
Merge All Windows and other tab management commands are available in Vellum’s Window menu, only when using macOS Sierra.