Apple Mac OS X players can use Safari browser now to play online games and tournaments at rubl.com.
Java plugin from Sun is required to play games and can be obtained from Apple web site:
Java plugin 1.4.1 (Panther) for Mac OS X 10.4.2 or later
or
Java 2 Platform Standard Edition (J2SE) 5.0 Release 3 for Mac OS X 10.4.2 or later
Read more information about java on Apple site
Now Mac players can use the full functionality of all the games.