I see that your very first post has been languishing here for 11 hours, so I feel compelled to respond.
There are many threads here about whether Sonar will ever run on a Mac (you can do a search). But FWIW, if some version of Sonar was available on an iPad, I would purchase my very first Apple product ever. Having said that, it's not going to happen any time soon.
If Cakewalk were to commit to OSX, it would IMO take years of development to get it to be as stable as Sonar on the PC. I would see this period as a transition time for Cakewalk with the recent acquisition by Roland, and I doubt they would be preparing a Mac version.
But it sure would be interesting if I were dead wrong.