Snow Leopard (10.6) and older versions of OS X
1. Hold the Option Key and choose System Profiler from the Apple Menu
2. When the System Profiler is finished gathering its data, click "File" then "Save As..."
3. Add your name to the filename, and save it to your desktop for easy location. Make sure the file format is "System Profiler 4.0 (XML)"
1. Hold the Option Key and choose System Information from the Apple Menu
2. When the System Information is finished gathering its data, click "File" then "Save As..."
3. Add your name to the filename, and save it to your desktop for easy location.
Obtaining your system.log
1. Using Finder, Navigate to /Applications/Utilities and open Console
2. Click system.log on the left side bar.
3. On the menu bar, click File, and select Save a Copy As. Make sure the file is saved to the desktop for easy location.
I've solved it.
Navigate to Users/Shared/
then you can find Battle.net and Blizzard folders.
Delete them. and Run Diablo III setup again.
It means delete Diablo cache. ( http://us.battle.net/d3/en/forum/topic/5575474873 )
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