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OpenGL Extensions Viewer provides info about your OpenGL accelerator. Many OpenGL extensions, as well as extensions to related APIs, have been defined by vendors. The extension registry is maintained by SGI.


  • Contains specifications for all known extensions, written as modifications to the appropriate specification documents.
  • Defines naming conventions, guidelines for creating new extensions, and writing suitable documentation.
  • Displays the vendor name, the version implemented, the renderer name, and the extensions of the current OpenGL 3D accelerator.
  • With internet more...

What's New

Version 4.2.5:
  • Updated database.
  • Bug fixes and improvements.


  • OS X 10.6 or later

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OpenGL Extensions Viewer User Discussion

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Jimw Member IconComment+454

While this may be academically interesting of what practical use is it, given that all Mac's, other for Mac Pro's have non-swapable graphics cards? Even with MacPro's the 3rd party graphic card, options are limited.

The time that knowing such parameters is actually useful is when making a purchase decision on a new Mac, or when replacing a graphics card in a Mac Pro. In either case you have to rely mostly on the vendors published specifications.

Reply1 reply
Version 4.2.5

This currently serves as more of a diagnostic utility, for understanding the details of your graphic card when something doesn't work. Since it's free, the broadness of its usefulness is irrelevant, as there is no monetary investment on the part of the end-user. If only a few people find it useful, then its purpose has been served.

Abramurkwian Member IconComment+37

Nothing has changed since 4.1.1. It still crashes on my Mac Pro. Older versions (prior 4.1.1) work fine. Any ideas?

Reply1 reply
Version 4.2.2

On another 12-core Mac Pro with NVidia GT120 it does not even open...

Abramurkwian Member IconComment+37

This version crashes on my Mac Pro 5.1 (Radeon 5870, 10.8.5). Anyone has the same issue?

Reply0 replies
Version 4.2.1
Xenophile Member IconComment+693

Now I have to download this via the App Store?

Dear Developer,
Please, pretty please, with sugar on top, offer a direct download!

Reply2 replies
Version 4.0.7

Yep, would be nice. The 4.0.8 version was announced by the dev 10 day before now the App Store has listed it. I think Apple takes sometimes long time to check especially freeware tools (no profit for apple!) after they get uploaded to Apple.
At least a few days the dev can offer an website DL until Apple has done the checks and offers App Store DL.


Agreed. I hate having the Apple store as a sole source for software. If I'm building an image I certainly can't include software registered to my account.

Umaromc Member IconComment+722

"Detects OpenGL 4.2 feature set"

So this is more useful for Linux/Windows users... *sigh*

C'mon, Apple!

Reply0 replies
Version 4.0.3
Glenn-Braid Member IconComment+189

Something strange I noticed is how in the previous version my OpenGL 2.1 scores were incredibly low but with the latest release (3.32) I'm getting close to 400fps - I am wondering whether the GLviewer has been optimised thus when it is properly optimised for the Apple OpenGL implementation the performance improves. My 2.1 score for the record went from 122 to 391 - something definitely must have changed - I've yet to test it on my iMac but I'm pretty certain that I'll see the same sorts of results.

Reply1 reply
Version 3.32

seems to be doing a different test now for 2.1 which means you have to pretty much take old results and throw them out window

Libertyforall1776 Member IconComment+1130

3.3.1 is out!

Reply0 replies
Version 3.30
Dokter_mac Member IconComment+104

The download link did not worked for me, for some reason...

This link worked well, after some searching:


Reply0 replies
Version 3.17
Talatharb Member IconComment+57

OS X 10.5.8 on PPC:
launches and quits with this error in the system.log

09.01.10 17:36:59 OpenGL Extensions Viewer[19987] Unable to load nib file: MainMenu, exiting

Reply1 reply
Version 3.16

reason: the german MainMenu.nib is empty

fix required, please

Low Flyer Member IconComment+52
Low Flyer

Downloaded what was supposed to be v3.15 but got v3.14. Happens all too frequently on MacUpdate.

Reply0 replies
Version 3.15
user icon+198
Version 4.0.7
> 5 7


Current Version (4.x)


Downloads 77,031
Version Downloads 1,146
Type Utilities / System
License Free
Date 29 Apr 2014
Platform Intel 64 / OS X
Price Free