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Disable Quartz Extreme on older Macs System
This hint is for you if you have a graphics card that is having problems with Quartz Extreme, and are having trouble disabling it. Or if you have a GeForce3 card in an old Sawtooth G4 and are getting flickering problems, then here is a simple way to disable Quartz Extreme which is most likely the cause of this problem. Use pico or your favourite text editor to edit the file: /System -> Library -> Frameworks -> ApplicationServices.framework -> Versions -> A -> Frameworks -> CoreGraphics.framework -> Versions -> A -> Resources -> Configuration.plist (you'll probably need sudo to edit the file). Look for the key GLCompositorMinimumVRAM and change its value to a value higher than how much RAM your graphics card has. So if you have a 64MB card, then 128 should work:
<key>GLCompositorMinimumVRAM</key>
  <integer>128</integer>
This may work with other key values, but this is the only one I have tried. This means OS X won't use Quartz Extreme unless the card has a minimum of the value you specified. Hence disabling it for your card. After the value is changed and saved, all you need to do is reboot and Quartz Extreme will no longer be enabled.

[robg adds: I haven't tested this one!]
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Disable Quartz Extreme on older Macs | 7 comments | Create New Account
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Disable Quartz Extreme on older Macs
Authored by: MasonMcD on Jul 27, '04 02:16:25PM

I'm getting a "segmentation error" when I try to edit. I've deleted the plist, and now I have a "Info-macos.plist" that appeared.

Does anyone have an original Configuration.plist they can share? Thanks.



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Disable Quartz Extreme on older Macs
Authored by: randalla on Jul 27, '04 10:51:11PM

Hrm, I may test this out on my powerbook. I have the rev. A 12" PowerBook which came with the GeForce420Go (32 Megs). I do a lot of monitor spanning which really starts causing a performance hit when I have a lot of windows open and start using exposé.

I'd really like to know what the GLCompositorUseOnPortable does. Maybe I can get it to turn of exposé when I am spanning if I play with that.



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Disable Quartz Extreme on older Macs
Authored by: DerekButterfield on Jul 28, '04 07:15:49AM

I did this using Property List Editor and re-booted. How do I know Quartz Extrene has been disabled? Cursor arrow still has the shadow. I'm on a TiBook 1GHz.



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Disable Quartz Extreme on older Macs
Authored by: DavidRavenMoon on Jul 28, '04 10:51:34AM
You can use Quartz Extreme Check to see if the machine is using Quartz Extreme or not.



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Disable Quartz Extreme on older Macs
Authored by: DerekButterfield on Jul 28, '04 11:46:26AM

Thanks a lot. I'll give it a try.



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Disable Quartz Extreme on older Macs
Authored by: Imidazole on Jul 28, '04 12:03:16PM
Well, I went ahead and did this on my 1.33ghz 17" PB, just to see if it was worth any kind of performance gains... and heres my review:

*Desktop Manager and Fast User Switch no longer do the cube animation
*Expose still does all of the same animations, except now they are SLOW AND CHOPPY
*Minimizing to the dock animation looks pathetic and choppy

No performance gains what-so-ever on a 'new' machine. I'd stick to doing this on older ones, as the article states.

-Imidazole
Check out this cool office prank!

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Disable Quartz Extreme selectively
Authored by: ThesQuid on Jul 28, '04 08:22:16PM

Somewhat related, is there any way to disable the use of Quartz Extreme for specific applications? I want to just turn off the "cube" effect when doing fast user switching.



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