Classic macs run off of Intel-compatible x86 processors, but they have upgraded over the years to fast and more capable processors. Macs are very expensive but are very much worth it for their ability to not pick up viruses and to run faster than other PCs.
A Macintosh is a computer. Windows is an operating system. A Macintosh can run the Windows operating system. The question is meaningless.
Apple's Macintosh computers use Apple's operating system known as OSX. The current version is OSX 10.8.#. Macintosh computers can also run the Windows and Linux operating systems, but those systems are not included in the purchase of the computer.
Windows is an operating system developed by Microsoft. Apple makes Macintosh computers that run Apple's own Mac OS X operating system but can also run the Windows operating system.
The Macintosh Operating System (Mac OS) was created for, and is compatible with, Apple's Macintosh range of computers. As the Macintosh is a personal computer (PC) it can also run other operating systems such as Microsoft's Windows or various implementations of Linux.
Macintosh computers use a completely different operating system and utilize different file types. However, you can still run Windows software on most Macintosh computers through applications such as Bootcamp.
Macintosh OS X Tiger is an OS (Operating System) made by Apple. Mac OS X Tiger has nothing to do with tigers. The purpose of an OS is to run programmes on a computer.
An operating system (OS) is the software used to run a computer. Windows is an example for a operating system. Apple designed the Mac OS to run more stable.
Apple Macintosh computers run Mac OS X. The most recent version is 10.6 which is known as Snow Leopard. (See links below)
An operating system runs common services for computer programs and manages the computer hardware resources. An operating system is necessary to run application programs.
Exel can be run on a few computer operating systems. Excel works very well with a PC computer system, Android computer system and with Windows computer systems.
The Macintosh Operating System (OSX and variants) is only supported on Apple Macintosh computers. There are hacks which will allow MacOS to be installed and run on PC systems, but this is not supported and may be unstable.
A virus is a file that was programmed to harm your computer. It may be transferred to your Operating System (the environment which runs your computer) and can be hidden within program files, system files, or your account files. Viruses can severely damage your computer, so purchase a good antivirus program, such as Norton Internet Security 2011 (for windows). If you run Macintosh, you already have virus protection.