You could get a low-end, previous-generation Mac Mini for just $450. For example, at Amazon.com: http://www.amazon.com/Apple-MA607LL-Intel-Drive-Combo/dp/B000BNP1MS/
You can also find used Macs on eBay (though prices are not much lower than retail there).
I think the $1200 20" iMac (from http://www.amazon.com/Apple-Desktop-Display-MB323LL-SuperDrive/dp/B000X3GTMM/ ) however is a better value, since it's an all-in-one including a large screen.
Amazon.com has current and past versions of Mac OS at http://www.amazon.com/gp/bestsellers/software/229660/
Under many items, there is a "used and new" option where you may find a better price.
I would have to say Mac OS X 10.4 Tiger , Or Leopard
Definitely a Mac is the right choice Source: I'm using a MacBook Pro right now
I have a Mac OS X but I know Mac OS is a computer made by the brand/company, Apple.
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.
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 best bet is probably the Adobe Flash Player for Mac OS X is available from the Adobe website.
Mac OS Leopard
The oldest mac OS is System 1
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.
Mac OS X is an operating system released by Apple Inc. It is designed for Apple branded computers, which is why you will never see a Dell, or an HP computer run Mac OS X. There are only two important versions of Mac OS X, Mac OS X Server, and regular Mac OS X. Mac OS X server was designed for servers, while regular Mac OS X was designed for most computers. The current version of Mac OS X (10.6) is named Snow Leopard.
You could try www.farm-bot.com They have a Mac OS X and Windows farmville bot and it works perfectly. good luck..