Differences between iOS GUI and Mac OS X GUI

1. What is the difference between iOS and Mac OS X?
2. What is the difference between macOS and OSX?
3. What is the difference between iPadOS and macOS?
4. What GUI does Mac use?

What is the difference between iOS and Mac OS X?

Mac OS X: A desktop operating system for Macintosh computers. It brings new features inspired by its most powerful users, but designed for everyone. Stay better focused on your work in Dark Mode. Automatically organize files using Stacks; iOS: A mobile operating system by Apple.

What is the difference between macOS and OSX?

Is there any difference between Mac OS X and macOS? No, they are essentially the same thing — just named differently. In fact, three terms were used at different times with reference to Apple's operating system: Mac OS X, OS X, and macOS. Mac OS X was the official naming through version 10.7, from 2001 to 2011.

What is the difference between iPadOS and macOS?

The iPad Pro runs on iPadOS and the MacBook Air runs on macOS. The latter is a full-fledged operating system, while the former has more in common with the iPhone. But things get confusing from here. Macs can run iPadOS apps, but iPads can't run some macOS apps.

What GUI does Mac use?

Aqua is the graphical user interface, design language and visual theme of Apple's macOS operating system.