I would also point out that these are User Forums, and that any Cakewalk staff pop in as often as the choose to in order to clarify or answer or diffuse something is a wonderful bonus.
Companies quite often try really hard to give timelines as certainties, when speaking of releasing new products - or even new versions of existing products, and while for whatever reason there was a general time frame for a preliminary beta-level Mac version - there are likely dozens of reasons why that particular event has been skipped for now.
But, obviously they put some likely large amount of effort into building that to a point where they thought it might be able to come out in an alpha state - and that alone is encouraging. Hopefully, they will figure out whatever has altered that - and folks will be better off by them putting out something better than what might have shown up those few months back.
Let's not lose our heads over this - Cakewalk has done a pretty good job over the decades, and my vote is to accept that they will continue to do things the best way they see fit, for a bigger picture view than maybe we see.
Bob Bone