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

I'm sorry but unless you have proof I don't believe this story one bit. Especially the point where the engineer stated that it's a hardware issue about the capability of the GPU. The GPU can handle playing a 3D game at almost full resolution on this machine, but it can't handle switching between desktops and Mission Control? Also, if the engineer stated that it has to do with the capability of the GPU then that is Apple stating that they built a defective machine, which would legally require the product to be recalled. Some users have reported switching to the discrete GPU fixes their lag. When I use the discrete GPU the lag is almost nonexistent, but is still present at some points, it's the integrated GPU that is awful.

What IS the surprise if there IS a recall? It's not like they haven't had a recall before! In fact, I welcome it! It proves that Apple has been working hard to resolve this problem and that any defective units will be replaced with a brand new, properly working machine! It simply can't be a coincidence that my second replaced unit is exhibiting the exact same symptoms! C'mon Apple, let's hear your say in this!

The most annoying bug for me is when I put the macbook in sleep and when I wake up it the clock in the menu bar shows incorrect time, it's always some minutes forward. Then I have to open the system preferences, click on date & time, system preferences crashes and the clock shows the right time.

They said in apple bug report system that it's a known bug but I'm waiting since September for the fix.

Someone has this bug?

@ Lex1179 - Nope, never had that happen before, and even if it went out of sync, the time corrects itself via Date & Time Internet Synchronization

Yes, that's the problem, it seems that Time Internet Synchronization doesn't work here. I already tried to reinstall and start from scratch, no fix

I was contacted by Apple again and this time they wanted to collect all information I could reproduce. Even videos I made earlier too. He didn't know who or when they would contact me again, but he assured that they would follow up.

He reffered to a early case number and now I'm uploading all my data to them.

I had to do the same. And upload 2 files  that logged when I recreated the lag so that they can analyze it

I spoke to apple today and they denied the issue even existed and the fact I didn't buy my MBP from an apple store they told me to take it back to we're I bought it... Even though I have a care pack

Total waste of time

So frustrated..

I was about to take my rMBP back to the Apple Store today again, but I thought...what's the point? They're not going to do much anything for me. The only thing I want to do is exchange my rMBP for one with a different processor, either the 2.3, 2.4 or 2.7 ghz version and prove my case. The 2.6Ghz processor is flawed and needs to be recalled!!

So, since the time... Is it certain that only laptops with 2.3 Ghz processor are not affected by the problem?

At least, I mean... people saying to have no lags, do they all have a 2,3 Ghz model ?

By the way... does anybody have taken the new 2.7ghz, just to see? I don't know, I love miracles, maybe lags disappear on these machines

Mine is 2.3Ghz Intel Core i7 mid-2012

Same here, 2.3ghz i7 mid 2012 (bought in 2013)

Okay thanks, so just ignore my post

How much ram and how much gpu ram? And which SSD?

This isn't true. I have now had two 2.3ghz models and both are consistent with lag so I do not think it has anything to do with the processor. As I have read alot elsewhere and the problem everyone seems to be saying (even an ex apple technician) is the scaling problem for that many pixels in which obviously the integrated gpu is not made for. Hence the reason the 1400x900 resolution runs the best results as it is exactly half on the full resolution and why another scaled resolution runs alot worse with the UI lag.  So very disappointed and even more so that I continue to use this machine I go further past the point of no return to a normal MacBook because being a video and photo editor the screen itself is flawless and beautiful, feeling like I need glasses when looking at a regular MBP.