On my Mac, I am unable to participate in more than one Webex Training session at a time.
If I already have a session open on my Mac, is it possible for me to start a second one?
On a Mac, how many Webex Events sessions can I participate in at the same time?
Users with Mac computers are only permitted to participate in a single Webex Training or Webex Event at a time. This does not apply to the Webex Meetings service; a user with a Mac computer is free to participate in several Webex Meetings at the same time.
See the following article for a list of known problems and restrictions: Known Issues and Restrictions for the Webex Meetings Desktop Application