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Mountain Lion Lag When Switching Desktops...

jgo78

jgo78

macrumors 6502
Original poster
I upgraded to ML today on my 2012 Air. I noticed a slight jittery lag when scrolling between desktops that have browsers on them. Anyone else notice this?

This happens only while the dock is enabled at the bottom of the screen.
 
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darn, there must be something wrong with mine then.

remember, i'm talking about switching through desktops that have browsers running on them. (not talking about scrolling up and down on a webpage)

let's say you have have 3 desktops going with 3 safari windows, one on each desktop and you're scrolling (sideways) through them, you don't see a slight 'unsmoothness' to it? I never noticed this before ML.

I rebooted and don't have anything else running but a few safari windows on multiple desktops. I checked this on my iMac and noticed the same issue.

Perhaps I need to do a clean install.
 
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djrod said:
Try this

https://forums.macrumors.com/threads/1412816/
Click to expand...

hmm, ok, seems the problem is related to mine. I did a test by hiding the dock and the desktop switching lag went away. It's still strange when this did not happen at all with Lion. Guess I'll have to play around.

Definately when the dock is removed, its smooth. As soon as the dock is there i see the lag.

Definately has to do with this stacks problem. When i move the dock to the side which doesnt use stacks, it's smooth even when the dock isn't hidden. As soon as i move it to the bottom (with stacks) the lag is there, this is weird. There's no way this should be lagging with stacks. Hopefully they fix this. Both my computers are fast enough for this not to happen.
 
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wrong again, i turned off stacks while the dock is at the bottom and it still lags. For me, as long as the dock is visible at the bottom only i get the lag, stacks or no stacks. Messed up.
 
jgo78 said:
wrong again, i turned off stacks while the dock is at the bottom and it still lags. For me, as long as the dock is visible at the bottom only i get the lag, stacks or no stacks. Messed up.
Click to expand...

I am experiencing the same on my 2011 air. Lag definitely caused by the dock when switching spaces. Clean install of ML. Was fine on Lion.
 
I've got the exact same problem and it goes away if I hide the dock. I haven't done a clean install of ML. My setup is a Macbook Air 2012 mid.
 
yep, i did a clean install, same issue. It's not a huge deal, just something a little annoying since it was buttery smooth with Lion. Hopefully a driver or other update will fix it.

U either have to run your browsers full screen, remove the dock entirely or move the dock to the sides. Why the issue occurs only when the dock is on the bottom makes no sense.
 
Same here too : MBA 2011

Seems worse at 1080p on an external monitor too

Noticed it straight away since upgrading. So jerky was making we feel a bit sick (im very susceptible to slow FPS).
 
Same problem here with MACBOOK AIR MID 2011. Was working perfectly with Lion, started laggyn after upgrade to ML. Tried disabling stack but nothing.
 
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