You mean unique software. Apple is at its core a software company. This seems counter-intuitive until you think about it for a minute. The hardware in most Apple devices is at best superficially different from the competition and Apple doesn't even manufacture it. Oh they make a big stink about their design as a marketing ploy but it isn't what really makes their products distinct. You can (and I have) put Windows on a Macintosh and the experience is not meaningfully different than on a Dell or HP. Apple differentiates their products primarily through their software. If a Macintosh was sold with Windows they would be unable to command the profit margins they currently do because their hardware is nice but it's not that different or better than their best competition.
This theory ignores the fact that the primary attraction for many Mac users, especially web developers and science/engineering types, is the POSIX underpinnings and the GNU toolchain. Apple did not create POSIX or GNU and do not substantially contribute to the development to them. Their support of CUPS and Clang is welcome and appreciated, and they recently open-sourced FoundationDB, which is nice if Cassandra isn't small-batch-craft-beer-check-shirt enough for your hipster ass..... but.... what else do they do in this space? Almost 100% of people working in these fields could use Linux instead, but they choose macOS because of the well-polished hardware integration, especially the screens, keyboards (maybe less so now) and touchpad.
Yes, there was a period where Apple was well-defined by great software: The early-mid 2000's. Programs like iPhoto, Garageband, and iMovie cemented their reputation as a company that could create really innovative software that was really easy to use. But that's a long, long time ago now. Here's the reality: There has been exactly one entirely new Mac application from Apple this entire decade. Yes, just one, and you'd never guess it: iBooks Author. That's it. Everything else they've done has been iterating on products from the Steve Jobs era (Mainstage, Motion, iTunes), or doing mediocre ports of mediocre iOS apps, like Homekit and Stocks. Whoop-dee-fucking-doo. Nobody's buying a Mac instead of a Surface because it can run desktop versions of mobile apps.
Apple isn't exactly the gold standard in pro software either. Most software devs don't love XCode.... Final Cut Pro X isn't capturing converts from Premiere.... Logic is very good but ProTools is still the industry standard.... tons of people choose Office over Pages, Sheets, Keynote and Mail.... Safari is generally considered inferior to Firefox and Chrome....
Add to that the fact that almost nobody can name a new feature of Mojave other than Dark Mode.... it sure feels like Apple is coasting on their Mac software efforts, not leading.