WebEx offers cross platform support, so you do not have to worry about which operating system you use. WebEx provides unmatched support for Windows, Mac, Linux and Solaris. Browser support includes Internet Explorer, Mozilla, Firefox, Netscape and Safari.
Please test your system at http://support.webex.com/support/downloads.html to make sure it meets the minimum requirements.
Further details on system requirements can be found: http://support.webex.com/support/system-requirements.html?_nfpb=true&_pageLabel=SystemRequirementsHome