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Old Mar 1, 2012, 07:48 AM   #1
kwissylawrencek
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Mission Control Lag in Lion, iMac

I have been using Lion since it came out and never had any problems with it. Then one day mission control just started lagging. Rather than smoothly scaling the windows into mission control like it used to, now mission control opens and the windows snap into place, and back upon closing mission control. There is a video below for reference.
I looked at the video and it's not just a laggy video, thats how it actually looks. Also youtube cut off the beginning of the video for some reason, but you get the ideo.

http://youtu.be/_D8Ed9kOeN0

Any ideas?
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Old Mar 1, 2012, 08:19 AM   #2
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First restart then try the Reset OS X cache system trick. Close any running programs the launch /Applications/Utilities/Terminal and run the code:
Code:
/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchServices.framework/Versions/A/Support/lsregister -kill -r -domain local -domain system -domain user
Then don't close Terminal until you get another Terminal prompt. Then the reset is completed. See if this helps.
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Old Mar 1, 2012, 12:13 PM   #3
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I have had the same problem.. Not very Apple like if you ask me.. I don't know though, I have been quite annoyed by it.
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Old Mar 1, 2012, 10:27 PM   #4
kwissylawrencek
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Quote:
Originally Posted by satcomer View Post
First restart then try the Reset OS X cache system trick. Close any running programs the launch /Applications/Utilities/Terminal and run the code:
Code:
/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchServices.framework/Versions/A/Support/lsregister -kill -r -domain local -domain system -domain user
Then don't close Terminal until you get another Terminal prompt. Then the reset is completed. See if this helps.
Unfortunately that didn't work.

Any other ideas?
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Old Mar 2, 2012, 08:26 PM   #5
sylvantemplar
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Are you by chance running a system that was in-place upgraded from Snow Leopard? If so, I've noticed similar on my 27" i7 iMac. My 21.5" i5 iMac (2011) is smooth as butter, though. However, it's running a fresh install of Lion - no in-place upgrade.

Were I in your position, I would back up your media to an external hard drive and do a format -> fresh install of Lion. Don't do a Time Machine migration of your existing install, or you'll defeat the purpose. I have a sneaking suspicion that issues of this nature relate to the convenient, (but flawed) Snow Leopard -> Lion upgrade through the App Store.
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Old Mar 3, 2012, 12:13 AM   #6
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Quote:
Originally Posted by sylvantemplar View Post
Are you by chance running a system that was in-place upgraded from Snow Leopard? If so, I've noticed similar on my 27" i7 iMac. My 21.5" i5 iMac (2011) is smooth as butter, though. However, it's running a fresh install of Lion - no in-place upgrade.

Were I in your position, I would back up your media to an external hard drive and do a format -> fresh install of Lion. Don't do a Time Machine migration of your existing install, or you'll defeat the purpose. I have a sneaking suspicion that issues of this nature relate to the convenient, (but flawed) Snow Leopard -> Lion upgrade through the App Store.
I believe it doesn't happen to your 21.5" iMac because the screen resolution is only 1080p while the 27" is 1440p (which is around 4x more pixels). When my MBP 15" 6490m is connected to a 1440p display, MI tends to "lag" after some hours of usage but when I unplug the 1440p display, MI reverts to a silky smooth state.
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Old Apr 28, 2012, 09:36 PM   #7
jjepyy
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Same problem since yesterday.

Sadly, this started happening to me yesterday. It was all fine a few days ago.

I did sometimes (since I bought it) noticed a little lag *a little*... minimal, but I could notice it because it wasn't as smooth as when I had no running applications.

And now...Mission control is slow and laggy... any fixes?

I'm using a 2011 13" MBP i5 and 8GB RAM with OS X Lion.
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Old Jun 2, 2012, 10:05 AM   #8
ayala421
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So did anyone figure out a definite fix for this? This just happened out of the blue to me.

I'm running 10.7.4
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Old Jun 10, 2012, 12:00 PM   #9
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I am experiencing something similar and also searching for some kind of resolution.

I have a 27" i7 iMac with the Radeon 4850 card, 8GB of RAM and a Corsair SSD. This thing is a rocket, and yet I get occasional lagging of gestures for mission control.

For example, sometimes I will do the four finger swipe on my magic track pad, and for several seconds the screen is just frozen and then I will get mission control or app windows to come up.

It's rather annoying, even more so because of how fast the computer is otherwise.
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Old Jun 10, 2012, 12:04 PM   #10
ayala421
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Quote:
Originally Posted by jmpage2 View Post
I am experiencing something similar and also searching for some kind of resolution.

I have a 27" i7 iMac with the Radeon 4850 card, 8GB of RAM and a Corsair SSD. This thing is a rocket, and yet I get occasional lagging of gestures for mission control.

For example, sometimes I will do the four finger swipe on my magic track pad, and for several seconds the screen is just frozen and then I will get mission control or app windows to come up.

It's rather annoying, even more so because of how fast the computer is otherwise.
Download and run Xbench, but unselect "Thread Test" in their dialog box. For some reason Xbench hangs on Lion so the fix for it is to unselect thread test.

This worked for me.
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Old Jun 10, 2012, 12:15 PM   #11
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Quote:
Originally Posted by ayala421 View Post
Download and run Xbench, but unselect "Thread Test" in their dialog box. For some reason Xbench hangs on Lion so the fix for it is to unselect thread test.

This worked for me.
Running Xbench fixed your problem, or unselecting thread test changed a setting in Lion that fixed the problem?
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Old Jun 10, 2012, 02:20 PM   #12
ayala421
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Running Xbench fixed my problem.
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Old Jun 11, 2012, 06:16 PM   #13
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I ran Xbench but I'm curious about how it could fix anything, it's just a benchmark program.
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Old Jun 11, 2012, 07:19 PM   #14
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I can second this. Been having this issue with my MacBook Pro (Santa Rosa) since Lion came out. I even wiped my drive and installed from scratch to try and fix the issue...

After months of being annoyed, xbench has fixed it. I just ran it once with the thread test unchecked.

Back to normal.

THANK YOU ayala421!
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Old Jun 11, 2012, 08:22 PM   #15
ayala421
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Smile

Quote:
Originally Posted by jmpage2 View Post
I ran Xbench but I'm curious about how it could fix anything, it's just a benchmark program.
Honestly I have no clue, but my assumption is that xbench forces your video card to clear the lag out.

----------

Quote:
Originally Posted by Payton View Post
I can second this. Been having this issue with my MacBook Pro (Santa Rosa) since Lion came out. I even wiped my drive and installed from scratch to try and fix the issue...

After months of being annoyed, xbench has fixed it. I just ran it once with the thread test unchecked.

Back to normal.

THANK YOU ayala421!
Your welcome
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Old Jun 11, 2012, 08:23 PM   #16
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Okay, fair enough. Reboots in the past though haven't cleared it. I mean, it will not happen 100% of the time, it will just spontaneously sort of freeze up and might not do it for another day or a week then it will happen again. I will do the gesture on the trackpad for expose/mission-control/spaces and it will simply stop responding then after maybe 5-10 seconds it will respond again and whatever gesture I had been doing will suddenly "activate".
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Old Jul 17, 2012, 09:56 PM   #17
HersheyTrojans
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(First time using the forums here, so sorry if formatting is wrong or something like that).

To the Mission Control Lag, I have experienced this myself. I have the late 2011 Sandy Bridge 15 inch Macbook Pro with the 2.4 ghz i7. All was working great until one time when I turned it on and everything was lagged as Ive read about here. I tried a bunch of things listed on here, xbench, graphics stress test, resetting smc, all that other stuff. I took it to the apple store and after dealing with a few different people I realized there was nothing they were gonna do except tell me its a "core OS problem".

After a complete reset of lion it worked fine, haven't had a problem in several months. But for those interested, a reset of lion will work.
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Old Jul 17, 2012, 10:01 PM   #18
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By 'resetting' Lion I am assuming you mean that you did a from-scratch installation? Did you restore from a TM Backup afterwards?
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Old Jul 18, 2012, 06:50 AM   #19
Joshi83
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I'm getting this almost every time on a current gen mac mini.
I even just upgraded it from 4 to 8GB ram but still does it.
Any hot corner action (show desktop/show all windows/show widgets) is a 3 to 4 second delay.
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Old Aug 10, 2012, 12:02 PM   #20
sticko
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I have Macbook Pro retina 2.6GHz Core i7 with 16GB RAM. It basically top of the line model, but mission control is very laggy. It can even takes 3-4 secs before opening. Unbelievable!!
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Old Aug 11, 2012, 03:39 PM   #21
thomas223
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I also had Mission control problems and tried numerous fixes and nothing worked. I finally decided to erase the OS partition and reinstall the Lion via internet recovery. This fixed mission control and strangely the iMac now runs much much faster than it did the day I bought it.
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Old Aug 29, 2012, 07:30 AM   #22
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I have this problem too but it's only when I'm running more than 2 programs. Maybe it's because my ram is only 4GB. Who knows.
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Old Aug 29, 2012, 09:12 AM   #23
jmpage2
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With Mountain Lion this problem has only occurred a couple of times. It is definitely related to the number of window items I have open, so I suspect that it is related to the amount of memory available in either the machine or the graphics card. I do have 16GB of RAM and I do have a higher end Radeon in my 27" i7 iMac.
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Old Sep 11, 2012, 04:13 AM   #24
Volkward
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Don't know if this helps anyone, but since I finally found a way to fix those Mission Control lags for my iMac and I'm happy again i just wanted you guys to know what I did:
It was the application frame mode of photoshop (or maybe all the applications within the Creative Suite...) that caused the laggy Mission Control animations at my iMac.
I tried all the other hints with dock animation, xbench, cleaning of cache, re-installing the OS and so on before - nothing worked. But as soon as I deactivated the application frame in Photoshop CS6 (Windows - Application Frame) everything went back to normal.
Hopefully this information is at least helpful for some of you guys

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Old Nov 6, 2012, 02:35 PM   #25
Wreckie
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I had headache with this mission control lag until I found this thread! Amazingly xBench fixed it for me, thank you alot, saved me time not having to reinstall OS.
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