Yahoo! Messenger 2.5.3 is just plain ancient, and I didn't notice -- or care -- until resuming use recently because both sons and their wives are thousands of miles away. The farther family, overseas since October, gave every household a web cam for Christmas, and said we all could get together using Yahoo! Now I find that Yahoo! isn't nearly as comprehensive as I previously thought. Messenger in its 2003 version for OS X is just plain primitive. So, I join others posting here in a call for a modern Mac OS version, for Messenger first. Then, Yahoo!, get going with other facets of your expanding portal services, and assure that Mac OS X is supported equally to Windoze. Indeed, you probably should look for a Linux capability or risk the fate of CP/M applications in the pre-Windows years. Because as widely used as it is, Windows has some major opposition -- and some is in nations where Mac OS X is thriving, as is Linux in some countries.