Hello, first of all sorry for my English, translation made by google.
Otherwise my little simple question, how to get SONAR OS X. Alpha?, Should buy a Windows version as SONAR Platinum to benefit from the compatible version OSX ?.
Thank you so much for helping my question
Joel.

It's not available yet. Cakewalk said that reaction to the alpha version is to gauge interest, so if they decide to go forward it will take a while to get from alpha to beta to finished product.

Ah !, ok thank you for the info, I turned enfaite formerly Windows and for the management of noon and my instruments I had sonar on the machine, a very good software, especially dimension afternoon with instrument definition files other small things like that other software on Mac do not provide.
After repetitive misery in Windows I switched to Mac and know that this software will make its appearance on Mac os is really for me a great news.
Again thank you for the info.

here is the official FAQ post:
 

SONAR OS X Alpha FAQ

  Why did Cakewalk choose to announce a Mac version after so many years of being a Windows only DAW?The Mac market is huge and we felt we needed to finally explore it in order to reach a new customer base. We’ve had so many requests over the years, from music creators on the Mac who’ve wanted to use SONAR. We’re excited to finally open up SONAR to this brand new audience.   
 
So how soon will SONAR be able to do everything on the Mac that it does on Windows? SONAR itself already does, but elements external to SONAR are a different story. For example, the Alpha version can’t run AU plug-ins, or talk to custom interface drivers (only Core Audio devices will work). There are also potential issues with video handling, as the two platforms handle video differently. Keep in mind this is an Alpha, so we are in the early stages.  
 
I own SONAR Platinum, Professional, or Artist today. If and when SONAR becomes commercially available on OS X, will I need to purchase a new license? No. You will be provided a new installer for your license of SONAR Artist, Professional, or Platinum. You do not need to purchase a new license.

Anderton
It's not available yet. Cakewalk said that reaction to the alpha version is to gauge interest, so if they decide to go forward it will take a while to get from alpha to beta to finished product.

I do Hope that this Mac alpha is just a little bit more important to Cake than just to "gauge interest" if they decide to go forward, as you put it.... 
 
After all they did advertise it as "We received a lot of requests for a Mac version of SONAR, so we’re very excited to announce SONAR OS X Alpha. This free version runs SONAR’s built in plug-ins, and works with any Core Audio compatible audio interface. Starting in the Fall, please join us in testing out this new frontier for SONAR—and then share your experiences, or find support, in the new SONAR Mac forum."

It is obviously important otherwise they wouldn't be going to all the

CW needs to make it as solid on Mac as it is on Windows. Digital performer was a huge disappointment when they ported it to Windows. I wouldn't want to see CW make the same mistake.

I thought the alpha version did not even require being a Cakewalk registered user to test when it arrives. Is that not true? The Mac version should be totally independent of the Windows version regardless.

I wouldn't be surprised if CW released OSX version just few days before autumn deadline, that's what they do with the Sonar rolling releases (and to be honest, I personally see nothing wrong with that, let them take their time to deliver great product!)

It seems to me that the Mac crowd have waited a long time to get even a maybe. Waiting a little longer doesn't seem unreasonable. Let the Bakers do their thing and I have no doubt it will be worth it.