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Glitches when running Microsoft Expression Blend under Parallels on a Mac

Thankfully, others have experienced this as well, but suddenly I had a weird issue with trying to run Expression Blend from my Macbook Air, which hosts a Windows 7 installation under Parallels.  When I would run it, it would look like it was running under 4-bit graphics or something, and totally unusable.

Apparently, it is due to how WPF apps (which I take Expression is, though I haven’t had a problem with Visual Studio 2010, which I think is a WPF app as well) work with hardware acceleration in this environment.  In any event, the fix is fairly simple. 

  • Open up regedit
  • Go to HKEY_CURRENT_USER\SOFTWARE\Microsoft
  • Create a new key called Avalon.Graphics
  • Create a new DWord value called DisableHWAcceleration and give it a value of 1
  • Restart Expression Blend

Works for me.

posted on Saturday, July 30, 2011 6:34 PM Print
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