Q: Mountain Lion UI Lag on rMBP !!! (Let's Make this thread serious and hope for a fix)

That's because windows doesn't use HiDPI resolution. There's a link earlier in this app that let's you change the resolution on OS X to a non-HiDPI res screen. The laptop runs blazing fast. But that defeats the purpose of owning a retina display, yes?

...earlier in this thread...not "app".

I used the full 2880x1800 resolution in Windows, with 200% UI size to make things readable. No lag whatsoever.

Thats not HiDPI thats just full resolution. You could also set this in Mac OS X and you wouldn't experience any lag there either. Research what HiDPI means.

How do you upsize the UI across all apps?

No. Full resolution reduces UI objects size to a pixel-to-pixel ratio, 1:1, so text and icons are small but yo are using the full resolution of the screen, and this mode works good.

HiDPI means that UI objects are scaled up while you are still at full resolution, making them more difined.

In this mode everithing is a mess.

C'mon Tim, it's time to solve this really bad issue!

How do you run at 2880x1800? And how do you increase the UI size? I can only select a maximum resolution of 1920x1200....

It is in essence HiDPI if all UI elements are scaled up 200% (4x the pixels). This is exactly what 'retina' does. 4x the pixels for everything.

No they aren't the same. If they were the same then we would have the 2880x1800 screen real estate in OS X if HiDPI only affected the UI elements. Increasing UI element size is not the same as HiDPI.

Lets clear what HiDPI stands for, High resolution Dots Per Inch.

How do you up-scale UI?

Anyone noticed the SMC update for the 15" retina MBP? It seems to give a little bit better performance in day-to-day use, or is it just me?

Yea, just installed, nothing improved... same lags, UI flickering, Safari flickering, text disappearing, active windows glitches, bla, bla, bla...

Ehi Tim, can you feel it? It's not the big one approaching, it's your CEO chair starting to move away...

They released 10.8.3

http://9to5mac.com/2013/03/14/apple-releases-10-8-3-to-the-public-with-ability-t o-mac-app-store-camera-gift-card-redemption-boot-camp-improvements-and-fixes/

Finally 10.8.3,  Listen Everyone,  Install the Update and  remember to chek if you have UI lag ,  Open  Quick Time Player ,  File  , New Screen Recording ,  Use your mac and see if it lags ....

that's the best way to test it ....

Downloading Update ATM