Click anywhere on the empty desktop, then at the top of the screen in the Apple menu bar is a menu that says Help, ask you question in the search bar. To get more information you should be connected to the internet when you access Help as it will access some new content online some times.
Mac OS has a graphical user interface (GUI).
You ask the administrator to give you access to the System Preferences. They will usually say "No".
None
Since there is no such version of Mac OS as in your question, I'm going to assume you mean Mac OS X 10.4, instead of 14.0. And no, Quick Books does not come with Mac OS. For a list of software included in the current Mac OS version, see the Apple Inc website at: "http://www.apple.com/macosx"
yes
Mac OS
Mac OS 10.5 is the fifth version of Mac OS 10 and is codenamed "Leopard". It provides stability enhancements as well as new features and a better user interface.
Medium Access Control
The Kodiak version of Mac OS X was an early test version released in 2000 it was designed to expire in 2001, when the first official release of Mac OS X (called Cheetah) arrived, and will no longer work - so that could not be considered very user friendly.
Providing the Intel based computer is manufactured by Apple then their Mac OS X software can work on it. The Mac OS X user's licensing agreement prevents Mac OS X being used on computers that are not made by Apple.
default folder preference file is damaged
GUI (pronounced "gooey") = Graphical User Interface