PowerPC OpenGL tweak

Tigerclaw - BlizzardTigerclaw (one of the Mac support guru’s at Blizzard) has posted a detailed description of how to improve frame rates on PPC Macs. This is considered beta, but I’ll test it and let you know if it works and if so, how well it works. If you try it, please post a comment for others.

Under patch 1.12.1, you can enable an optional feature which we consider to be in a “beta” form, to smooth out frame rates on PowerPC systems a bit.

It is simple to do, and easy to turn off if you run into problems – though if you do, we would like to hear from you. We have tested this on some systems here but it has not yet gone through a full compatibility test suite, so engage at your own risk (the worst case outcome would be, if it doesn’t work, just remove the file described below from your home/Library/Preferences folder to return WoW to normal operation).

This setting is not recommended for Intel systems – they use a better mode of operation and do not need this tweak. Also, this is only recommended for PowerPC systems that have more than 512MB of RAM, as it may use a few extra megabytes of memory – but try it if you like anyway.

Here is how you set it up. Make sure you do not have WoW running first.

A. copy the three lines of text below onto your clipboard (select then hit Command-C). The first line is the “cat” command, the last line has the “4” on it.

cat > ~/Library/Preferences/com.blizzard.Internal.prefs
#Current User\Internal\VBBMODE

B. open Terminal.app (in Applications/Utilities) and it should provide you with a UNIX command prompt. What we’re going to do is paste the text in above, which will ask the command line to create a file in your preferences directory named “com.blizzard.Internal.prefs”, and will inject the two lines of text after it into that file. We’re asking WoW to use “vertex buffer broker mode 4” which is the new code for PowerPC systems.

C. Paste the copied text into Terminal. (Command V).
D. Now hit Control-D (not Command-D). Control-D concludes the command we started in step C and closes the file.

E. All done ! Start WoW and see how it runs.

If you run into trouble or have questions, you can post here or email us at wowmacteam123@blizzard.com.

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