There was an Apple-customized version of pngcrush in every version of Xcode before 4.3. I can’t find it in Xcode 4.3. Is it still available as a standalone exe file?
Another related question: where are the files from Command Line Tools for Xcode installed?
The best way to find it is to use the xcrun tool.
xcrun -sdk iphoneos5.0 -find pngcrushwill print the path on stdout whilexcrun -sdk iphoneos5.0 pngcrushwill actually execute the command for you.See
man xcrunfor more info.