Hi geoffr,
<br>
One of the known issues with the 2.1.x test releases and the upcoming 2.2 is that the internal audioplayer does not work on Mac, which means that playing linked audio does not work. The problems lies in one of the underlying libraries we are using. Once we've released 2.2 we will start working on upgrading to a newer version of this library. It is a rather big change which is why it didn't happen for 2.2.
We understand that this might be a deal-breaker for some Mac-users, but at the moment there is not much to be done about it.