in the dictionary app on mac OS X, mac is defined as "a mackintosh" (kind-of silly that they misspelled "macintosh".
Yes. That would be what the "OS" stands for. It's full name is Mac OS X. Mac = The Apple Macintosh computers it is designed for. OS = Operating System. X = The Roman numeral representing version 10 of the Mac OS.
The main OS for Mac can be found on a Mac when it is switched on. The current main OS is called Mac OS X.
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"
I have a Mac OS X but I know Mac OS is a computer made by the brand/company, Apple.
opereting systen
You cannot without erasing your hard drive and installing Mac OS 9 from scratch. Even then Mac OS 9 may not run on modern Mac hardware because Mac OS 9 needs the ROM chip to boot. Modern Mac OS X hardware uses EFI to boot the system instead of a ROM chip to boot. Mac OS X v10.0 - Mac OS X v10.4 support Mac OS 9 applications and can run them, you just need to install the Mac OS 9 compatibility program which can be found on the Mac OS X Install CD.
The second name of Mac OS X v10.4.5 is Mac OS X v10.4 Intel.Mac OS X 10.4 was known as Mac OS X Tiger.
The oldest mac OS is System 1
Mac OS Leopard
Mac OS X 10.4 (Tiger) needs to be purchased as it is not possible to update from Mac OS X 10.2.8
Unless the disc is damaged and so needs reformatting you can run the Mac OS installer over an existing Mac OS.