Just run the script and wait five to ten minutes (depending on the size of your Address Book). You should modify the script if you're using a different gateway in their email address, it adds an appropriate jabber yahoo gateway address using (e.g. Now the problem is that all my contacts showed up as something cryptic like instead of the nice Address-Book-associated way with a picture and 'John Doe,' so I wrote this AppleScript to go through my Address Book. After doing this, all my Yahoo IM contacts showed up in Psi, and then in iChat when I started that and connected to the same Jabber server. This discussion pretty well covers how to set up the Jabber gateways through the use of a Jabber client like Psi, but one little trick that's not mentioned here that I had to do to get it to work was to authorize the Yahoo gateway after adding it as a service. I also get to use some of the advanced video features that multi-chat clients like Adium don't support.

This is nice, since neither Yahoo Messenger nor MSN Messenger are great programs on the Mac, and now I can run only one program (iChat) instead of three. Using a Webcam, you can see who you're chatting with or view the Webcam of any Yahoo member who has granted you access.One not-so-well-advertised feature of the new iChat 3.0 is that you can see all your Yahoo Messenger and MSN Messenger buddies and talk to them via Yahoo and MSN gateways in Jabber, which is newly supported in iChat. It also includes Launchcast Radio, Yahoo Games, and Yahoo Audibles. Other features include the ability to create a chat room automatically, stock price alerts, the ability to send messages to friends (even if they're not online when you are), a Quick Compact mode that hides the Messenger tools to maximize your viewing area, Messenger Themes, and voice chat, which allows you to talk for free to anybody else on the Internet. Yahoo Messenger offers firewall support, a standby mode that minimizes the program until an Internet connection is made, the ability to save and print your conversations, and a tabbed interface that provides quick access to your favorite stocks, news, and sports scores. It also can alert you to new e-mail in your Yahoo Mail or Yahoo Personals accounts, or when you have upcoming events recorded in your Yahoo Calendar.

Yahoo Messenger is a free service that allows you to see when friends come online and to send them instant messages.

Yahoo instant messenger for mac