Mac OS 9

Mac OS 9 was the final major release of Apple's "Classic" Mac OS. Introduced on October 23, 1999, Apple positioned it as "The Best Internet Operating System Ever," highlighting Sherlock 2's Internet search capabilities, integration with Apple's free online services known as iTools, and improved Open Transport networking. (further reading)

There are several sources contain a downloadable Mac OS 9 Install Disc or Boot Disc (a.k.a. Toast version). Install Disc is a disk contains the installation tools. Unlike Windows, Mac OS 9 Install Disc is actually a Mac OS 9 with limited features and the installation app. Boot Disc or Toast Disc is a CD bootable Mac OS 9 in full version or installed version. After booting from it, users can copy the content of the disc to the hard disk. The target partition should have Apple OS 9 driver installed.

Mac OS 9.2.1 Install CD:
http://www.mac-torrents.com/torrents.php?mode=download&id=c6fac687cf62819b8030756a4effca7fa5efd851

Mac OS 9.0.4 Install CD:
http://rapidshare.com/files/97399306/MOS9.part1.rar
http://rapidshare.com/files/97401013/MOS9.part2.rar
http://rapidshare.com/files/97401841/MOS9.part3.rar
http://rapidshare.com/files/97403349/MOS9.part4.rar
http://rapidshare.com/files/97404172/MOS9.part5.rar
http://rapidshare.com/files/97396705/MOS9.part6.rar
http://rapidshare.com/files/97399225/MOS9.part7.rar

Mac OS 9 CD (I couldn't get it extracted...):
http://rapidshare.com/files/213243904/MOS9-CD.part01.rar
http://rapidshare.com/files/213244879/MOS9-CD.part02.rar
http://rapidshare.com/files/213503803/MOS9-CD.part03.rar
http://rapidshare.com/files/213463772/MOS9-CD.part04.rar
http://rapidshare.com/files/213600956/MOS9-CD.part05.rar
http://rapidshare.com/files/213474850/MOS9-CD.part06.rar
http://rapidshare.com/files/213604838/MOS9-CD.part07.rar
http://rapidshare.com/files/213618349/MOS9-CD.part08.rar
http://rapidshare.com/files/213618512/MOS9-CD.part09.rar
http://rapidshare.com/files/213639320/MOS9-CD.part10.rar
http://rapidshare.com/files/213638333/MOS9-CD.part11.rar
http://rapidshare.com/files/213638326/MOS9-CD.part12.rar
http://rapidshare.com/files/213662062/MOS9-CD.part13.rar
http://rapidshare.com/files/213662026/MOS9-CD.part14.rar
http://rapidshare.com/files/213662077/MOS9-CD.part15.rar

Mac OS 9 Classic Toast and update of 9.1, 9.2.1 and 9.2.2:
http://torrents.thepiratebay.org/3498222/MacOS_9_retail___updates.3498222.TPB.torrent

Mac OS 9.2.2 Classic Toast boot disc:
http://rapidshare.com/files/404322295/MacOS.9.2.2.Classic.toast.part1.rar
http://rapidshare.com/files/404322296/MacOS.9.2.2.Classic.toast.part2.rar
http://rapidshare.com/files/404322244/MacOS.9.2.2.Classic.toast.part3.rar
or
http://www.filesonic.com/file/16198249/MacOS.9.2.2.Classic.toast.part1.rar
http://www.filesonic.com/file/16057317/MacOS.9.2.2.Classic.toast.part2.rar
http://www.filesonic.com/file/16116793/MacOS.9.2.2.Classic.toast.part3.rar
Details: MacOS 9.2.2 is the last version of MacOS based on the original Macintosh operating system.
Please note: this isn't a install CD. This is custom bootable CD with fully working MacOS 9.2.2.
This disk contain two folders:
1) Applications (some original apps and Toast 5)
2) System Folder (system folder)
To install, drag and drop System Folder to hard disk. There should be Apple OS9 driver installed while partitioning the hard disk.
This disk is made specially for eMac G4 800 Mhz (Ati Graphics version) and 100% compatible. This model of eMac won't boot this CD if you change internal CD-ROM to custom DVD-ROM.