Does anyone know whether the new 10.5.3 release fixes some of the driver issues that necessitated disabling Unity gfx features for the X3100? And if so, when can we see that in a Unity release? It’s killing me not to be able to develop on my MacBook Air while on the road 
Even if not disabled you won’t be able to really use them. Intel Onboards are “joke boards”, they are not for shader intense 3D applications, only for 3D applications that use shaders to raise the visual quality.
At least unless you consider 10-15 FPS “realtime gameplay”
That’s fine; I don’t really care if it runs like a slideshow on my at-home development system as long as visually, it’s representative of the final product. We use different systems for performance testing anyway.
We are actively investigating any potential graphics driver fixes included as part of 10.5.3. Please sit tight 
On a related note, I just noticed after upgrading to 10.5.3, on a macbook pro with ati x1600, that there is an issue with the collor correction script.
it gives artifacts and makes the whole game screen corrupt.
I hope this can be fixed in a unity update in the near future.
I think the garbage might be caused by the error you see at the bottom. Somehow a shader gets lost (I don’t know how), and so it does not fill the output render texture contents (leaving random garbage). Were there any changes you did to the script/shader?
I’m not sure how to fix this.
I have not modified the script and have done a new installation of unity.
The random garbage appeared after installing the 10.5.3 update
I think it’s something to do with apples new graphic drivers.
I just upgraded to 10.5.3 and have seen the same kind of corruption, now, although it’s on a smaller scale. The screenshot shows an example. I’m not yet using any shader but the simple “Diffuse” one.
UPDATE: This effect goes away when I test my program in “Maximize on Play” – it only shows up in a ‘split’ view.
I hope that there’s a fix soon (from Apple, I would presume). I’ve got to do a demo of my project next week!
–
David Robinson
This was posted yesterday to mac-opengl mailing list by Chris Bentley (of ATI Mac driver team).
Ah thats good to see, so apple will release a fix soon I hope.
Don’t hold your breath. Intel X3100 dirvers in OS X has been “broken” since the release of the first Santa Rosa MacBook (Nov 2007). Still waiting…
10.5.3 fixed them, actually.
–Eric
So, does this mean that X3100 Macs get working shaders and shadows in Unity soon?
As Aras wrote some time ago:
http://forum.unity3d.com/viewtopic.php?t=10818&highlight=x3100
That looks like it. We just tested OS X 10.5.3 on X3100 last week, and it looks like we can re-enable features there. Will be in Unity 2.1 soon-ish.
Will there be a 2.1 beta even-more-soonish? 
Or is this on hold because of the iPhone stuff?