IMac with RadeonHD2600 not supporting WebGL

I'm running a 2.8Ghz core2 Duo imac (2008) iMac with an ATI Radeon HD 2600 Pro graphics card (EFI Driver 01.00.219) and cannot run any WebGL applications or sites using a WebGL supported browser like Chrome. I'm up to date on all my software updates (OSX 10.6.7) and the latest version of Chrome.
The page from Google below lists the Radeon 2600 as a supported card. Not sure what the option is here. Software update does not tell me there are any available software or firmware updates. suggestions?
http://www.google.com/support/chrome/bin/answer.py?answer=1220892

Hello,
The Google web page you linked only contains a list of unsupported graphics cards. Support may or may not appear in the future, but you should still be able to view WebGL with Chrome's software renderer. I have the same machine and I first used WebGL today.
Additionally, according to Wikipedia Safari supports WebGL but it is disabled by default. Apparently it can be a security risk.

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Originally Posted by mpe
At least mine doesn't
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I'm not sure what update you were doing so here's a bunch of suggestions. The first set are to try routine repairs and troubleshooting. The second set (with reference to security updates) involve reinstalling updates and/or the operating system.
In future I'd go with the recommendations in my "updating" section and not let Software Update do it. Just let it tell you what needs updating, then do it yourself.
Boot from the installer disk, select language if applicable, choose utilities, run Disk Utility and verify (and repair if necessary) the drive. You can verify a drive from DU on your main drive while booted but I have found this can result in incorrect reporting of errors. To repair your drive you have to run it from a drive other than the boot drive anyway.
Next, boot from your drive in [Safe Mode|http://docs.info.apple.com/article.html?artnum=107393] and repair permissions. You can repair permissions while booted from the installer disc but this uses the permissions configuration on the installer disc which may be out of date if you have run any updates on your computer. Booting your computer to Safe Mode restricts the number of things running on your computer while permissions are being run and does a bit of spring cleaning at the same time.
[Resolve startup issues and perform disk maintenance with Disk Utility and fsck|http://docs.info.apple.com/article.html?artnum=106214]
[Using Disk Utility in Mac OS X 10.4.3 or later|http://docs.info.apple.com/article.html?artnum=302672]
[Disk Utility's Repair Disk Permissions|http://docs.info.apple.com/article.html?artnum=25751]
From BDaqua (couldn't have said it better):
"Try Disk Utility
1. Insert the Mac OS X Install disc that came with your computer (Edit: Do not use this disc if it is not the same general version as what you have currently on your computer, e.g. use a Tiger disc for a Tiger drive, not a Panther disc), then restart the computer while holding the C key.
2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu. (In Mac OS X 10.4 or later, you must select your language first.)
Important: Do not click Continue in the first screen of the Installer. If you do, you must restart from the disc again to access Disk Utility.
3. Click the First Aid tab.
4. Click the disclosure triangle to the left of the hard drive icon to display the names of your hard disk volumes and partitions.
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[Mac OS X: About the Archive and Install feature|http://support.apple.com/kb/HT1710?viewlocale=en_US]
[X-Lab Archive and install|http://www.thexlab.com/faqs/archiveinstall.html]
[Kappy's A&I instructions|http://discussions.apple.com/thread.jspa?threadID=1823034&tstart=0 ]
[How to get files from a previous home directory after Archive and Install|http://docs.info.apple.com/article.html?artnum=107297]
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http://discussions.apple.com/message.jspa?messageID=8728797#8728797
http://discussions.apple.com/message.jspa?messageID=8733921#8733921
http://discussions.apple.com/thread.jspa?messageID=8634535#8634535
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http://discussions.apple.com/message.jspa?messageID=8991074#8991074
Updating
Certain steps appear to minimize the risk of an update producing problems.
Number one is to make sure you have a clone backup of your computer in case you do need to back out of it again. This is the only guaranteed way of not having to worry about the results of an update.
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[Resolve startup issues and perform disk maintenance with Disk Utility and fsck|http://docs.info.apple.com/article.html?artnum=106214]
[Using Disk Utility in Mac OS X 10.4.3 or later|http://docs.info.apple.com/article.html?artnum=302672]
[Disk Utility's Repair Disk Permissions|http://docs.info.apple.com/article.html?artnum=25751]
You can also go to the step of booting into safe mode to do the install.
[Mac OS X: Starting up in Safe Mode|http://docs.info.apple.com/article.html?artnum=107393]
[What is Safe Boot, Safe Mode? (Mac OS X)|http://docs.info.apple.com/article.html?artnum=107392]
[Safe Boot takes longer than normal startup|http://docs.info.apple.com/article.html?artnum=107394]
I like to download the update onto my computer and install it from there rather than let Software Update do it. I know a few people who had problems with doing the update via software updater found a manual install to work.
Repair permissions again afterward.
It also helps to only install one update at a time and to run the computer for a while to make sure it is behaving well.
The more cautious even like to unplug third party peripherals (see [comment by BDaqua|http://discussions.apple.com/message.jspa?messageID=9040746#9040746]).
Almost all of the above steps (except backup) have been questioned as to necessity because probably many people have done successful updates without doing them. I say they can't hurt, they can very likely do good (especially if your computer isn't regularly maintained), so why not do them to be safe.
[BDaqua's comments on updating problems|http://discussions.apple.com/message.jspa?messageID=8948595#8948595]
[Baby Boomer's comments on updating problems|http://discussions.apple.com/message.jspa?messageID=9025760#9025760]

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IMac with RadeonHD2600 not supporting WebGL

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