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

I personally think the UI lagging bug is a serious issue on rMBP because this machine cost $2000 and up and it lags on UI features such as Mission Control and Space Switching while classic Macbook pros don't. I do understand that the retina display models carries a high resolution display, but I think the quad core CPU should have the ability to handle it (please correct me if I am wrong)



I am hoping and asking anyone experiencing the issue to follow up with this thread and post your concerns. Let's hope for a fix soon and we can really enjoy the beauty a Retina Macbook Pro brings to us.

MacBook Pro with Retina display, OS X Mountain Lion

Posted on Jul 27, 2012 7:26 PM

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1,322 replies

Sep 20, 2012 12:55 AM in response to poidet

No. Maximizing Contacts i still lagging. But mission control, zooming in safari, scrolling in Safari, scrolling between programs in full screen etc is ok. And noe delay when I am logging in. Animation in Calendar when changing months by using swipes with to fingers is better, but still have a sligth lag. As I said, its clearly better, but not optimal.

Sep 20, 2012 1:01 AM in response to Tigerwong

I agree it is became better, but too far from optimal.. and even worse why we have to wait while they will fix it ? it is china noname company ?


P.S. with Intel video card it is still laggy too much, with nvidia it become really better. But it means that you still can't work long without electricity and feel good from what you will see on screen.

Sep 20, 2012 2:28 AM in response to poidet

Ok here lies the issue - some people are claiming that the lag in safari is gone.. it is not, whats likely happening is that those people are using website that are not dense in text and advertising.. for example this website is smooth when I zoom and scroll, on the other hand huffington post, yahoo news, rotton tomatoes or any other website with tons of text and advertising all over the page have huge amounts of lag and framerate issues when *zoom+scrolling. Today I tested 3 rMBP side by side all spec'ed out the same (2.6/16gb/512) all of them still have the lag in safari unchanged after the update again when zoom+scrolling.. note by this I mean not just scrolling normally and not just zooming in and out, but when zoomed in and then scrolling afterwards...


Yes the UI in Mountain Lion is a bit zippier the framerates are not better all apple did is make everything transition a little bit faster. Also note I always have auto graphics switching turned on - I shouldnt have to turn that off to use safari, and I zoom all the time since I don't use the "reader" function that often.


I've spoken to Apple Care and they know there is an issue they had previously mentioned they were working on it I feel like its a stall as others have mentioned with this resolution of this Mac the graphics hardware may not be able to handle everything smoothly; I really hope I am wrong but so far Apple hasnt done anything to show otherwise.

Sep 20, 2012 4:36 AM in response to Lex1179

With Nvidia active there is slightly less choppiness; the *zoom+scrolling has been tried on three different rMBP's after the update. That being said its still not acceptably smooth with graphics switching off AND it should be working smoothly with the HD4000 otherwise what is the point of a dual graphics card? with the nvidia graphics active the battery life drops down to 3-4 hours or nearly half of what Apple advertises the rMBP battery life to be.


Also my house has a 2010 13 inch MBP, a 2009 white MB and a 2008 iMac all dual cores all smoother than the rMBP during *zoom+scrolling (note the iMac/ White MB haven't been update to ML but the 13' MBP has) so basically cheaper older computers are able to do these simple tasks better than a brand new state of the art $3k computer... again, not acceptable, the slow frame rate and choppiness really interfere with the user experience. I'll be going in to the Apple store in the next few days I'll try the *zoom+scrolling on them too but I don't think there will be any surprises - they will likely act the same.

Sep 20, 2012 5:12 AM in response to dsciel

Five minute ago my system freeze and I pressed the power button to shutdown the machine. I was writing a comment in a blog with Disqus, nothing special, I thought they fixed these hang yesterday with the EFI update, I was wrong. I reported the bug in the apple bug report system and they marked the bug as duplicate.

They know very well about all these problems, that's sad, they put in the market a machine that they knew has problems.

Sep 20, 2012 9:51 AM in response to Lex1179

Bionic eye 😉


It's an esitmation really, but it is slow enough where I can count them. I did it aboout 6 or 7 times in a row and just counted and averaged.


Here, I took a Vid, you can count yourself... it's fun! [Sarcasm] : http://cld.ee/f/WLI2PS1RzzYDyCkz


It's most noticable on minimization. Oddly enough, the Genie effect... super smooth.


I know it's kind of apples an oranges cause I'm on a 2009 MBP that may or may not have graphics switching (I'm not sure) but I thought it may provide some insight.

Sep 20, 2012 10:24 PM in response to dsciel

I posted earlier that removing Mission Control animation helped the lag. Well... it did for the first few hours. But now, instead of a stuttering/fragmented fade-in/out effect, it simply freezes the entire computer for 2-5 seconds and then the desired elements are shown on the screen. Music (playing in iTunes) also stutters/freezes... so this is not just a visual impact - it's audible as well! Just pulling up Mission Control actually froze my computer on two occasions for roughly 20-30 seconds. Luckily I have a 45-day return policy through Best Buy. If it's not fixed within 25 days, I'll just return and get a new one... and just hope it's a machine-specific problem (or at least specific to everyone on this forum) and not one that affects all MBP retinas.


I'm actually surprised that this machine is so much more laggy and slow when compared to my significantly less powerful MBA. Major disappointment.

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

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