We've had success using Adobe Connect 9.1 and Mac OS X 10.9 (Mavericks). Hopefully, this page will help you get through issues related to Mac OS X 10.9.
Recommendation: use the Safari browser.
While the latest Firefox should work, we've heard some anecdotal cases where it has not. Do not use Chrome browser.
- Get and install the latest Adobe Flash Player (see http://get.adobe.com/flashplayer/)
- Get and install the latest Adobe Connect Add-In (see http://helpx.adobe.com/adobe-connect/kb/latest-connect-91-addin.html)
- Remove sandbox restrictions from your Safari player
- Verify you are using the Adobe Connect Add-In when you run meetings (see Check the version of Flash Player and Adobe Connect Meeting Add-In)