I think it's left out because it's about 17 years old and most people who would be familiar with the name of the editor already know it's a macOS app. But you'

I think it's left out because it's about 17 years old and most people who would be familiar with the name of the editor already know it's a macOS app. But you're right, that 'native' tagline is such a big draw these days, it is probably worth mentioning the OS in the title.