X Error on startup - Mac OS X

Case 1 - X11 is not installed.

X11 is a prerequisite for ADT/PMV and Vision. X11 can typically be found on the Mac OS X installation DVD. Scroll down in the 'Mac OS X Install disc' window and locate "Optional Installs". Double click to start the Installer, at the 'Installation Type' stage open the Applications category, select X11 and proceed. Once installed, be sure to run Software Update to obtain the latest version of X11.

• http://www.apple.com/support/downloads/x11formacosx.html

• http://developer.apple.com/opensource/tools/runningx11.html
• http://cjmart.in/2006/12/01/install-x11-on-tiger-without-the-tiger-install-dvd
  

Case 2 - BasAllloc error mesassage.

X Error of failed request:  BadAlloc (insufficient resources for  operation)
   Major opcode of failed request:  150 (GLX)
   Minor opcode of failed request:  3 (X_GLXCreateContext)
   Serial number of failed request:  1758
   Current serial number in output stream:  1759

$ defaults write com.apple.x11 enable_stereo -bool false

• http://www.apple.com/support/downloads/x11update2006113.html