It's for OS X (Panther), I'm pretty sure it would work with Tiger as well. If you are using 9 there's a link right below the download for X.
[url=http://mithrapride.org/members/guildmember.cgi?function=prof&name=Dukuji]'Kuji[/url]; The [color=green][b]{[/b][/color]Ninja[color=red][b]}[/b][/color] [color=green][b]{[/b][/color]Cat[color=red][b]}[/b][/color] -------|m >^-^< m|------- Seeker of Oblivion