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All replies
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Helpful answers
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Oct 27, 2014 11:54 AM in response to staywatchfulby smazurov,I was having the same issue, and, for me there was a lot of mis-information. What helped was a comment in another thread to reset the SMC. It was an immediate difference and took all of 2 minutes. I never had fireVault turned on (fdesetup status signifies that it is off). If all you're getting is slow UI (without any flicker, weird spots on the monitor, etc), try SMC reset: Intel-based Macs: Resetting the System Management Controller (SMC).
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Oct 27, 2014 1:34 PM in response to Jessie Bryanby dapvincent,My issue is not fully resolved with disabling the transparency, though it does help a lot.
Like Jessie, I too performed a fresh install over the weekend as a test. The issue is still apparent when plugging in an external. Not sure if I can afford taking the time to go back to Mavericks, although things did run beautifully.
Anyone have any updates from Apple on a potential fix?
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Oct 28, 2014 3:20 AM in response to staywatchfulby Tommy grant,hey. i think i found a solution but it does require backing up all your work.
the problem is is that you may have installed mavericks on mountain lion, and Yosemite on mavericks, 3 layers of OS X does cause lag, doing a clean install should solve this problem for you
You need to do a clean install by downloading a fresh copy of Yosemite on a (minimum 8gb) usb drive and then delete everything and start from scratch. click here to get a step by step: http://osxdaily.com/2014/10/18/clean-install-os-x-yosemite/
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Oct 28, 2014 3:25 AM in response to staywatchfulby Tommy grant,hey. i think i found a solution but it does require backing up all your work. the problem is is that you may have installed mavericks on mountain lion, and Yosemite on mavericks, 3 layers of OS X does cause lag, doing a clean install should solve this problem for you You need to do a clean install by downloading a fresh copy of Yosemite on a (minimum 8gb) usb drive and then delete everything and start from scratch. click here to get a step by step: http://osxdaily.com/2014/10/18/clean-install-os-x-yosemite/
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Oct 31, 2014 11:36 AM in response to Tommy grantby Jessie Bryan,Hello,
I already tried that - no success. Do you have an AMD 6490M ? Chances are you do not, and are having separate issue than a few of us with AMD 6490M chipsets on Yosemite.
I spent the time to format and clean install Mavericks, and it's back to running great, I wish the same was true when I tried Yosemite.
If anyone sees progress with AMD 6490M reported issues, please update this thread!
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Oct 31, 2014 3:03 PM in response to Jessie Bryanby dapvincent,Anyone find a formal fix using the AMD 6490M yet?
Something interesting happened to me the other day. I had the computer docked to the thunderbolt display, closed the lid, reopened it and finder crashed. I got an error report saying there was a critical graphics error. Everything refreshed and the desktop came back on. Since then, I have had 0 lag, like when I was using Mavericks. It's as if there was a cached driver file that needed to be flushed, and then the correct drivers were loaded. Wish I could explain how to reproduce, but it was completely random from my point of view.
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Nov 3, 2014 7:16 AM in response to dapvincentby Rotox,I'm having the identical problem you did with the same hardware. Tried closing the lid and reopening but did not get a graphics error/crash. Would be great to find out what it actually did to clear it up and whether the problem reappears.
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Nov 6, 2014 6:38 AM in response to staywatchfulby AA78,Just adding my name to the list - same AMD Radeon HD 6490M 256 MB graphics as others have reported. Runs fine without the TB Cinema Display, but like a dog when its connected.
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Nov 18, 2014 4:57 AM in response to staywatchfulby Thataboy,Try removing Backblaze.
I had no problems in Mavericks. After upgrading to Yosemite, I was getting constant beachballs with Carbonite installed. Deleted it, and beachballs went away. Installed Backblaze. While doing the initial backup, I get the beachballs, but when I pause it... no beachballs.
My guess is that these online backup processes might be causing problems in Yosemite (or on fusion drives, like in my iMac).
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Nov 18, 2014 12:37 PM in response to staywatchfulby t.cservenak,Had same problem: MBP mid 2014 + 2yr old Thunderbolt display. Note: my MBP came with Mavericks, was upgraded to Yosemite.
Problems I had: huge lag when switching between spaces, lag and dead slow window resizing, effects like combo box selection was almost as being slow motion, etc... was very slow. Still, Activity Monitor did not show any "drag" (CPU usage), nor did the other hints (like disabling transparency) help at all, lag was always same. One thing I noticed: in clamshell and two-monitor mode (MBP open), Thunderbolt display was laggy, but when MBP used w/o display, it was okay, not laggy.
I went for solution recommended by user "smazurov" few responses below: reset SMC
Intel-based Macs: Resetting the System Management Controller (SMC) - Apple Support
Now the switch between spaces, window resizing is snappy as I'd expect...
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Nov 18, 2014 12:42 PM in response to staywatchfulby Rotox,New firmware update came out today for Thunderbolt Display. Guess they were waiting for 10.10.1 to release first. With the new firmware and turning on Reduce Transparency, disabling auto-switching graphics card it seems to be better now on my setup especially with zooming. However not as good as it used to be before Yosemite so clearly not completely resolved (in my case).
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Dec 6, 2014 6:01 PM in response to Rotoxby Rayced,Those updates haven't fixed the issues. I did a clean install of Yosemite. Not only I am experiencing lags but also graphic glitches very bad. I agree with dapvincent. In Mavericks no problems, and that system of mine was upgraded from Lion to ML and then to Mavericks; it also has many more applications installed compared to the clean installed Yosemite.
Does someone knows if it is possible to use previous (Mavericks) AMD Radeon HD 6490M drivers on Yosemite?
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Jan 30, 2015 7:41 AM in response to staywatchfulby paolo.mactux,Same here with 10.10.2 . MAcbook early 2011 was perfect with mavericks, very very laggy with yosemite.
Unbelievable.
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Feb 9, 2015 1:35 PM in response to paolo.mactuxby gwhobbs,I have an early 2011 MBP with the 6490m and am having the same issue. Going from 4GB to 8GB seemed to help with the integrated card... I hope it is not an unresolvable VRAM issue.
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Feb 10, 2015 6:50 AM in response to gwhobbsby paolo.mactux,I have 16gb of ram and an ssd... and it is very laggy, 10.10.2 now.