Mac OS X documentation

[abs1nth]

fromt the wiki:
"open tools/osx/vdrift.xcodeproj and hit "Build" from XCode's "Build" menu."

this is all that is needed - of course *only* if the xcode project is currently up-to-date. it it isn't it can be fixed *most* of the time by

1.) removing files from xcode that are in the project but not in repository anymore
2.) adding new files that are not yet in the project but have been added to the repository.
(you can see added or removed files in the output of "svn update)

if these two steps dont fix it you cant fix it without actual xcode/developer experience.