Sharing audio over screenshare fails on Mac, but not PC

Hello! I have posted about some issues related to this before but had resolved them. We recently found another issue:

We have an experiment in which the experimenter runs a PsychoPy experiment built in PyHab on their local computer, and screen/audio shares with the participant. This is done so that the experimenter can control the presentation of stimuli conditional on the participants’ gaze behavior toward the stimulus. We recently found that when screensharing from a Mac to a PC, no sounds are shared from PsychoPy (but sounds from other programs, e.g., iTunes, work as expected). Using the exact same experiment, screenshared from a PC to a Mac, sounds are shared as expected.

Any ideas why the sound sharing would not work on a Mac but works fine on a PC?