Mac OS is a popular family of operating systems.  "Classic" Mac
OS The "classic" Mac OS is characterised by its lack of the
command line, and encompasses the different Mac OS' from 1984 to
2001.  OS X OS X (re-branded from "Mac OS X" in 2012) is the
latest version of the Mac OS operating system (initially
released in 2001), and is also the basis for iOS.  Useful
Programs Wine is one of the easiest and most popular way for
Linux users to run programs written for Microsoft Windows. The
Wine team has created a port for OS X that is well maintained
and in a usable state.  Boot Camp Boot Camp is an official piece
of software included with OS X that assists users in installing
and running Microsoft Windows in a partition on the hard drive.
The most recent version only includes support for Windows 7 and
Windows 8.  The Shell The Unix Shell "bash" available on OS X is
a very useful tool for doing system tasks. If you use OS X as
your main operating system, then it is heavily recommended that
you learn how to use it.