Will this Mac version be free for everyone to use or is it only available to those that own/purchase a version of SONAR (artist, platinum etc.)?

I would say everyone who purchases Sonar and whatever version it comes in, all others will have to pay for it.  Why would Cakewalk make it Free to all? they would be out of business giving away their software.

I know some companies have free versions of their software and the mac main page says it's a free version so I was curious.

The free version of Sonar is Sonar LE. 

So would this first mac entry be the LE equivalent?

No. I'm really not sure what your question is about. There is no reason to expect CW to give away Sonar. What they clearly said is the Mac version will be available to Sonar members at no charge. This means you need to have a legal version that is current to DL the Mac version. If you are not a current customer you will need to buy a license or buy and upgrade. Think of it as how VST developers offer their plugins. You buy the plugin you get a Win VST and a Mac AU version.  

Everything appears to still be on the hush hush as to when SONAR OSX Alpha is gonna be available . 
SONAR members that have SONAR bought and paid for are even asking when it is gonna come out ...
 
If by some chance my SONAR membership runs out before they release SONAR OSX Alpha , I'm under the clear impression that If I want SONAR OSX Alpha for my Mac , I'm gonna have to re up my member ship to have it available as a registered product in my Cakewalk account 
 
When I was a little boy , I guess my mamma was right when she said no tickey no laundry ..
 
All is not lost ,while your here you may notice that there is a lot of free helpful advice to be had here on this forum
 
Kenny

Thanks all. I'm a life long pc user but had some fam asking about the mac version. The wording I read could've gone either way so I wanted to check here. Thanks again.

Interesting. I read it as the alpha being free to all as well, I would guess to create interest for the official release when it is finalised. That said I don't care either way. I am quite happy with the windows version:)

I'm pretty sure it will be free but will also be decidedly "alpha". It probably won't be as fully featured as regular Sonar. Kind of a teaser.