Optimized means optimized and includes the smallest details, like graphics in old formats, being modernized.
Compatible means compatible in the biggest way though. You do not need to update older computers, needlessly.
Big Business 12 is ready to support any mix of systems— any PC's, with any Macs, any Windows, with any macOS.
Focus will be the buzzword of 2020. Dark Mode makes it easier to stay focused, says Apple, and it's now in many apps including browsers and Big Business. It's a start.
Future options will help you focus on your business priorities —profit, productivity, exceptional customer service— without losing sight of what makes it work—your people.