Mac OS 10.9 support was added for Relay Recorder version 4.3.1 and later. The recorder may be obtained by logging into the Relay website and choosing download recorders from the menu bar at the top.
Note: The Download Recorders menu bar may not display version 10.9 in the list of versions. As long as the Server is running Relay 4.3.1 the recorder has been tested and will work correctly. The OS 10.9 version will be added to the menu bar in a later release of the Relay software.