In addition to SlingPlayer Mobile for iPhone making an appearance at MacWorld 2009, Sling Media has also made it known that we can expect a first look at high definition SlingPlayer content on OS X. Oddly, though, the HD streaming won’t be through the actual SlingPlayer application installed on your Mac - instead, it will be through the browser version at Sling.com. While we’d prefer to see it in the native app (and one would think that functionality has to be coming,) we will take whatever we can get as it pertains to SlingBox streaming in OS X. Oh, and since its housed on Sling.com, the HD streaming will be free.