Fixed version of script from http://www.twistedape.me.uk/blog/blog/2014/09/15/xcode-6-simulator-folders/

simulatorAppFolders.sh

#! /bin/bash

# DHC - Hacked to always return a 0 code when successful.

SIM_DEVICES_FOLDER=~/Library/Developer/CoreSimulator/Devices
SIM_RUNTIME_PRFIX=com.apple.CoreSimulator.SimRuntime

function usage () {
  echo "simulatorAppFolders (-s <name> | -d <device-type>) [-?] [-i <iOS version>] [-a <app-name>]"
  echo "-? show help, and prints simulators currently installed"
  echo "-s <simulator name> the name of the device as it appears in Xcode's device list. Prints the folder of this simulator without -i will choose the first matching folder"
  echo "-d <simulator device type> the device type as it appears in the simulator plist file. Prints the folder of this simulator without -i will choose the first matching folder"
  echo "-i <iOS version> finds the folder matching the iOS version as well as the simulator name"
  echo "-p Used with -s to print the installed apps on a simulator"
  echo "-a <application name> Used with -s to print the application and data folder of the application"
  echo ""
  echo "simulator names:"
  cd ${SIM_DEVICES_FOLDER}

  for dir in *
  do
      DEVICE=$(/usr/libexec/PlistBuddy -c "print :name" ${dir}/device.plist;)
      RUNTIME=$(/usr/libexec/PlistBuddy -c "print :runtime" ${dir}/device.plist)
      DEVICETYPE=$(/usr/libexec/PlistBuddy -c "print :deviceType" ${dir}/device.plist)
      iOS_VER="${RUNTIME##*.}"
      device_type="${DEVICETYPE##*.}"
      echo "iOS: ${iOS_VER}, deviceType: ${device_type}, name: ${DEVICE}"
  done
  exit 1
}

SIMULATOR_NAME_ARG=""
APPLICATION_ARG=""
iOS_VERSION_ARG=""
DEVICE_TYPE_ARG=""

OPTIND=1

while getopts 's:d:a:i:?p' opt
do
  case "$opt" in
      s) SIMULATOR_NAME_ARG="${OPTARG}"
	 ;;
      d) DEVICE_TYPE_ARG="${OPTARG}"
     ;;
      a)
        APPLICATION_ARG=${OPTARG}
      ;;
      i) iOS_VERSION_ARG=${OPTARG}
      ;;
      p) PRINT_APPS_ARG=true
      ;;
      ?) usage
      ;;
  esac
done

shift $(( OPTIND - 1 ))

if [[ "${SIMULATOR_NAME_ARG}" == "" && "${DEVICE_TYPE_ARG}" == "" ]]; then
   usage
fi

cd ${SIM_DEVICES_FOLDER}

for dir in *
do
  simName=$(/usr/libexec/PlistBuddy -c "print :name" ${dir}/device.plist)
  simRuntime=$(/usr/libexec/PlistBuddy -c "print :runtime" ${dir}/device.plist)
  simDeviceType=$(/usr/libexec/PlistBuddy -c "print :deviceType" ${dir}/device.plist)
  iOSVersion="${simRuntime##*.}"
  iOSDeviceType="${simDeviceType##*.}"

  if [[ ("${SIMULATOR_NAME_ARG}" == "${simName}" || "${DEVICE_TYPE_ARG}" == "${iOSDeviceType}" ) && ("${iOS_VERSION_ARG}" == "" || "${iOSVersion}" == "${iOS_VERSION_ARG}") ]]; then

    DEVICE_FOLDER="${SIM_DEVICES_FOLDER}/${dir}"

    if [[ "${APPLICATION_ARG}" == "" && ! "$PRINT_APPS_ARG" ]]; then
      echo "${DEVICE_FOLDER}"
      exit 0
    fi
  fi
       
done

DATA_FOLDER=${DEVICE_FOLDER}/data

if [ ! -d "$DATA_FOLDER/Containers" ]; then
   echo "There are no applications built for this simulator: ${SIMULATOR_NAME_ARG} ${DEVICE_TYPE_ARG} ${iOS_VERSION_ARG}"
   exit 1
fi

APPLICATION_FOLDER=${DEVICE_FOLDER}/data/Applications

function findAppFolder () {
  cd $1
  APP_FOLDER=""
  for dir in *
  do
    if [ -d $1/${dir}/${APPLICATION_ARG}.app ]; then
      APP_FOLDER=$1/${dir}
      break;
    fi

  done
}

function printAppsInFolder () {
  cd $1
  for dir in *
  do
    for dir in  $1/${dir}/*.app
    do
      y=${dir%.app}
      basename ${y}
    done

  done
}

if [ -d "${APPLICATION_FOLDER}" ]; then
   #We have the applications folder this means we are likely in an iOS 7 style application
   
   if [ "${PRINT_APPS_ARG}" == true ]; then
     printAppsInFolder ${APPLICATION_FOLDER}
   fi

   if [ "${APPLICATION_ARG}" == "" ]; then
       exit 1
   fi

   findAppFolder ${APPLICATION_FOLDER}

   if [ "${APP_FOLDER}" == ""]; then
     echo "We couldn't find the applications folder for this app."
     exit 1
   else
     echo "${APP_FOLDER}"
   fi
fi

CONTAINER_FOLDER=${DEVICE_FOLDER}/data/Containers

if [ "${PRINT_APPS_ARG}" == true ]; then
  printAppsInFolder ${CONTAINER_FOLDER}/Bundle/Application
fi

if [ "${APPLICATION_ARG}" == "" ]; then
  exit 1
fi

findAppFolder ${CONTAINER_FOLDER}/Bundle/Application

if [ "${APP_FOLDER}" = "" ]; then
  echo "We couldn't find the applications folder for this app."
  exit 1
else
  echo "App folder = ${APP_FOLDER}"
fi

# We need to get the application bundle idnetifier and use this to find the correct dataFolder.
BUNDLE_IDENTIFIER=$(/usr/libexec/PlistBuddy -c "print :CFBundleIdentifier" ${APP_FOLDER}/${APPLICATION_ARG}.app/Info.plist)

APPLICATION_DATA_FOLDER=${CONTAINER_FOLDER}/Data/Application
cd ${APPLICATION_DATA_FOLDER}

for dir in *
do
  IDENTIFIER=$(/usr/libexec/PlistBuddy -c "print :MCMMetadataIdentifier" ${dir}/.com.apple.mobile_container_manager.metadata.plist)
  if [ "${IDENTIFIER}" == "${BUNDLE_IDENTIFIER}" ]; then
    echo "dataFolder = ${APPLICATION_DATA_FOLDER}/${dir}"
    exit 0
  fi

done

echo "Couldn't find data folder"