OpenGL 4 for Mac 
About damn time.
I’m sure it’s like 4.1 with 4.3 support coming when OpenGL 5.0 is out for 3 years. [/bitter]
I’m glad it’s finally arriving so I can at least look at some of the cool Direct3D 11 demos.
Edit: Damn… I hate being right. 4.1 fully supported, but 4.2 is partial support and 4.3 is completely MIA - http://forums.macrumors.com/attachment.php?attachmentid=416395&d=1370906414
Is it actual full OpenGL 4 support? I recently heard that a new version of Mountain Lion had OpenGL 4 tessellation, but that’s about it.
EDIT: Oh, in 10.9. I thought you meant out now
It’s still way better than the recent OGL version of OSX and a big leap 
But still worse then what Windows and Linux users have.
No not really.
It’s actually pretty much on par with Direct X 11 for Windows. OGL 4.3 is just better optimized than 4.1 and has OSL 4.3 But the feature set is pretty much the same.