Below is a simple bash script that uses the PlistBuddy executable on MacOSX to generate an auto increment versioning script. To use: Open Xcode 5 Select Project > Build Phases Click Menu: Editor > Add Build Phase > Add Run Script Build Phase Click into White Text Box Below Run Script and Paste Contents of Gist

autogenbuild

#!/bin/bash
# Auto Increment Version Script
buildPlist=$INFOPLIST_FILE
echo $buildPlist
CFSVString=$(/usr/libexec/PlistBuddy -c "Print CFBundleShortVersionString" "$buildPlist")
CFBundleVersion=$(/usr/libexec/PlistBuddy -c "Print CFBundleVersion" "$buildPlist")
BUILD_NR=${CFBundleVersion##*.}
    BUILD_NR=$(($BUILD_NR + 1))
    #echo $BUILD_NR
    CFBundleVersion=$CFSVString".0."$BUILD_NR
    #echo $CFBundleVersion
    /usr/libexec/PlistBuddy -c "Set :CFBundleVersion $CFBundleVersion" "$buildPlist"