The eMacs were discontinued in 2006. The earlier versions with a G4 processor running at less than 1GHz can run Mac OS X 10.4 (Tiger). The later versions with a G4 Processor running faster than 1GHz can run Mac OS X 10.5 (Leopard). Select About this Mac from the Apple menu (top left) to determine the speed of the processor.
Mac OS X 10.5 (Leopard)
It's a Mac Os X Lion.
The latest version of Mac OS X is 10.7.2 known as Lion
Osx snow leopard I think ^^^^Thats wrong the answer is OS X Lion :)
Yes, you can upgrade to Lion from any iMac that uses the Intel processor. But the newest OS is Mountain Lion.
I have a Mac OS X but I know Mac OS is a computer made by the brand/company, Apple.
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.
Mac "Lion" and Mac "Snow Leopard" refer to iterations of Apple's Mac OS X (operating system, version 10). "Lion" is the newest as of this writing, and is version 10.7, while "Snow Leopard" is its immediate predecessor, and is version 10.6.
Apple's Mac OS X 10.5 Leopard was released on October 26, 2007.
Linux (ubuntu 10.10 and higher) and mac OS x (newest version) because they're the fastest best looking and simplest.
The oldest mac OS is System 1