OSX is USD$20 upgrade at the App Store. There may be licensing requirements wherein the purchaser must have purchased the previous retail version.
According to Apple's own Web site you can buy the Mac OS X 10.6 (Snow Leopard) for $22.99.
Apple's Mac OS X email client is called Mail.
Os X is the operating drive on which a Mac and any apple device functions on. When there is an Os X on a PC it means that it is compatible with devices from apple.
Mac OS X is the OS used on Apple's Macintosh computers.
Each version of Apple's Mac OS X is named after a big cat. Mac OS X 10.5 is called "Leopard".
OS X is a computer operating system, developed by Apple. Information on the latest operating systems, including OS X can be found at the Apple website. If you already have OS X installed, you could find out more information by choosing 'More Info' from the 'About this Mac' option in the Apple Menu. Further information about OS X can be obtained by visiting an Apple store or and Apple Authorised Reseller.
Apple's Mac OS X can legally only be used on Apple's Macintosh range of personal computers.
Apple's Mac OS X. OS X Lion OS X Panther OS X Leopard etc.
Technically OS X can run on a PC, and many hackers have created "cracked" versions of OS X that will run on a PC. The reason it does not is because Apple requires OS X to be run on "Apple Branded Hardware".
Apple's Mac OS X is legally only used on Apple Macintosh computers.
OS X Leopard Which stands for Operating System 10.
The current version of Apple's operating system is Mac OS X 10.7 (Lion).