Where can I find El Capitan's default and beachball/busy cursors?
The default cursor is available here:


  /System/Library/PrivateFrameworks/EFILogin.framework/Versions/A/Resources/EFIResourceBuilder.bundle/Contents/Resources/loginui_cursor@2x.png


I can't seem to find the busy cursor, but I did find an older-seeming version of it here:


  /System/Library/Frameworks/GLUT.framework/Versions/A/Resources/waitCursor.tiff