AutoCAD for Mac cannot launch with unsupported Mac OS languageIssueYou have installed AutoCAD for Mac and on startup it displays the splash screen and then either freezes or quits without an error message. SolutionThe most common cause of this issue is when the primary language of the Mac OS is one that is not supported by this release of AutoCAD for Mac. The supported languages for AutoCAD for Mac are currently as follows: - U.S. (US)
- British (UK)
- French (France)
If your Mac system language is not one of these three, you may be able to work around this issue by changing the OS language to one that is supported. 1. Select the "System Preferences..." option from the Apple menu: 
2. Depending on your Mac OS version, choose either "Language & Text" (Snow Leopard) or "International" (Leopard): 
3. Drag one of the supported languages to the top of the list to make it the primary system language: 
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