Hello Stuart and Alan,
I'm sorry the lack of Mac support is not available yet. Currently we are preparing the 6.9 version for open beta - among other improvements, namely with speed and performance, this version will also get two-factor authentication.
Mac support is the next priority after we release version 6.9. As for ETA, I'm not sure I can give any estimates - far too often they were incorrect in the past due to various reasons.
Happy New Year to everyone!