The Chrome team wrote on Monday that Chrome will soon drop support for OS X 10.5 and that future versions will only be available for Snow Leopard (10.6) or higher on the Mac. The version of Chrome that will do this will be Chrome 2,291 22 (more specifically, version 22.0.1201.0), which has just been seeded into the dev channel for Mac, Windows, Linux, and Chrome Frame users.