Hi, I want start to implement a Tokend module for a smartcard but Im pretty unexperienced in Mac development (I just implemented a Windows MiniDriver for this smartcard). Reading the documentation at http://smartcardservices.macosforge.org/trac/wiki/documentation/building it seems to be very simple to compile your project. Unfortunately Im unable to build neither the SmartCardServices nor the tokend project. Following the documentation I called: mkdir 9J61 cd 9J61 sudo darwinbuild init 9J61 sudo darwinbuild SmartCardServices After preparations and download of the sources it always ends with: Xcodebuild: error: cant exec '/Applications/Xcode.app/Contents/Developer/usr/bin/xcodebuild (errno=No such file or directory) Regarding to the log (see attachment) it seems to be a problem with the development environment. Ive installed XCode (6.1.1) and command line tools and DarwinBuild. But the log reports that gcc, as, xcodebuild are not available although they are all available: whereis gcc -> /usr/bin/gcc gcc version -> Apple LLVM version 6.0 (clang-600.0.56) (based on LLVM 3.5svn) whereis as -> /usr/bin/as as v -> Apple Inc version cctools-862, GNU assembler version 1.38 xcodebuild version -> Xcode 6.1.1 Build version 6A2008a Can anyone help me please. BR, Harry