human
What is the difference between Windows and Mac operating systems?
assistant
The biggest difference between Windows and Mac operating systems is that Windows is developed and marketed by Microsoft, while Mac is developed and sold by Apple. Additionally, Windows uses a graphical user interface (GUI) that is designed for users to interact with their computer by using a mouse and keyboard, while Mac uses a different type of GUI called Aqua. Additionally, Windows is a closed-source operating system, while Mac is open-source and allows users to customize their computer's settings more extensively. Finally, Macs are generally more expensive than Windows computers.