I am trying to do a simple build automation of my iPhone apps with TeamCity, but having this nagging issue.. When I manually pickup and install .app file from the build folder it works great (syncs smoothly with iTunes and I can see the app on my phone) But when I try to zip this with /bin/zip or ditto...then the zipped contents loose the CodeSigning (iTunes says that it cannot install this app because its not signed) I have tried different combinations of these.. ditto -ck --rsrc --keepParent HelloWorld.app HelloWorld.zip Any more ideas?