We've had several. • Mountain Lion / Mavericks • El Capitan • High Sierra Yes, these releases had new features, but so did Snow Leopard. Behind the scenes t

We've had several. • Mountain Lion / Mavericks • El Capitan • High Sierra Yes, these releases had new features, but so did Snow Leopard. Behind the scenes there was grand central dispatch, and in front there was QuickTime X, App Exposé, and Exchange support. I also happen to think Snow Leopard is overrated, its legacy largely due to the fact that Lion was really bad. This isn't to say Apple shouldn't do another polish release. They're overdue for one.