diff --git a/installer/appbundle/filebot.sh b/installer/appbundle/filebot.sh
index 94237bfb..bbe871ed 100644
--- a/installer/appbundle/filebot.sh
+++ b/installer/appbundle/filebot.sh
@@ -20,4 +20,5 @@ APP_ROOT=`cd "$PRG_DIR/../.." && pwd`
 # restore original working dir
 cd "$WORKING_DIR"
 
-java -Djava.awt.headless=true -Dunixfs=false -DuseExtendedFileAttributes=true -DuseCreationDate=false -Djava.net.useSystemProxies=true -Dsun.net.client.defaultConnectTimeout=10000 -Dsun.net.client.defaultReadTimeout=60000 -Djna.nosys=true -Dapplication.deployment=app "-Djna.library.path=$APP_ROOT/Contents/MacOS" "-Djava.library.path=$APP_ROOT/Contents/MacOS" "-Dnet.filebot.AcoustID.fpcalc=$APP_ROOT/Contents/MacOS/fpcalc" -jar "$APP_ROOT"/Contents/Java/* "$@"
+
+java -Djava.awt.headless=true -Dunixfs=false -DuseExtendedFileAttributes=true -DuseCreationDate=false -Djava.net.useSystemProxies=true -Dsun.net.client.defaultConnectTimeout=10000 -Dsun.net.client.defaultReadTimeout=60000 -Djna.nosys=true -Dapplication.deployment=app "-Djna.library.path=$APP_ROOT/Contents/MacOS" "-Djava.library.path=$APP_ROOT/Contents/MacOS" "-Dnet.filebot.AcoustID.fpcalc=$APP_ROOT/Contents/MacOS/fpcalc" -jar "$APP_ROOT"/Contents/Java/* "$@"
\ No newline at end of file
diff --git a/installer/portable/filebot.sh b/installer/portable/filebot.sh
index e9c4dc6c..f076d0e6 100644
--- a/installer/portable/filebot.sh
+++ b/installer/portable/filebot.sh
@@ -1,9 +1,27 @@
-#!/bin/bash
-SOURCE="${BASH_SOURCE[0]}"
-while [ -h "$SOURCE" ] ; do SOURCE="$(readlink "$SOURCE")"; done
-dir_bin="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
+#!/bin/sh
+PRG="$0"
+
+# resolve relative symlinks
+while [ -h "$PRG" ] ; do
+  ls=`ls -ld "$PRG"`
+  link=`expr "$ls" : '.*-> \(.*\)$'`
+  if expr "$link" : '/.*' > /dev/null; then
+    PRG="$link"
+  else
+    PRG="`dirname "$PRG"`/$link"
+  fi
+done
+
+# make it fully qualified
+WORKING_DIR=`pwd`
+PRG_DIR=`dirname "$PRG"`
+APP_ROOT=`cd "$PRG_DIR" && pwd`
+
+# restore original working dir
+cd "$WORKING_DIR"
+
 
 # force JVM language and encoding settings
 export LANG=en_US.utf8
 
-java -Dunixfs=false -DuseGVFS=false -DuseExtendedFileAttributes=true -DuseCreationDate=false -Dfile.encoding=UTF-8 -Djava.net.useSystemProxies=false -Dsun.net.client.defaultConnectTimeout=10000 -Dsun.net.client.defaultReadTimeout=60000 -Djna.nosys=true -Dapplication.deployment=portable -Dapplication.analytics=true -Dapplication.warmup=false -Dnet.filebot.AcoustID.fpcalc=fpcalc "-Dapplication.dir=$dir_bin" "-Djava.io.tmpdir=$dir_bin/temp" "-Duser.home=$dir_bin" "-Djna.library.path=$dir_bin" "-Djava.library.path=$dir_bin" -Djava.util.prefs.PreferencesFactory=net.filebot.util.prefs.FilePreferencesFactory "-Dnet.filebot.util.prefs.file=$dir_bin/prefs.properties" -jar "$dir_bin/FileBot.jar" "$@"
+java -Dunixfs=false -DuseGVFS=false -DuseExtendedFileAttributes=true -DuseCreationDate=false -Dfile.encoding=UTF-8 -Djava.net.useSystemProxies=false -Dsun.net.client.defaultConnectTimeout=10000 -Dsun.net.client.defaultReadTimeout=60000 -Djna.nosys=true -Dapplication.deployment=portable -Dapplication.analytics=true -Dapplication.warmup=false -Dnet.filebot.AcoustID.fpcalc=fpcalc "-Dapplication.dir=$APP_ROOT" "-Djava.io.tmpdir=$APP_ROOT/temp" "-Duser.home=$APP_ROOT" "-Djna.library.path=$APP_ROOT" "-Djava.library.path=$APP_ROOT" -Djava.util.prefs.PreferencesFactory=net.filebot.util.prefs.FilePreferencesFactory "-Dnet.filebot.util.prefs.file=$APP_ROOT/prefs.properties" -jar "$APP_ROOT/FileBot.jar" "$@"
\ No newline at end of file
diff --git a/installer/portable/update-filebot.sh b/installer/portable/update-filebot.sh
index a5054348..4cc35c4b 100644
--- a/installer/portable/update-filebot.sh
+++ b/installer/portable/update-filebot.sh
@@ -1,8 +1,26 @@
-#!/bin/bash
-SOURCE="${BASH_SOURCE[0]}"
-while [ -h "$SOURCE" ] ; do SOURCE="$(readlink "$SOURCE")"; done
-INSTALL_DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
+#!/bin/sh
+PRG="$0"
 
-JAR_FILE="$INSTALL_DIR/FileBot.jar"
+# resolve relative symlinks
+while [ -h "$PRG" ] ; do
+  ls=`ls -ld "$PRG"`
+  link=`expr "$ls" : '.*-> \(.*\)$'`
+  if expr "$link" : '/.*' > /dev/null; then
+    PRG="$link"
+  else
+    PRG="`dirname "$PRG"`/$link"
+  fi
+done
+
+# make it fully qualified
+WORKING_DIR=`pwd`
+PRG_DIR=`dirname "$PRG"`
+APP_ROOT=`cd "$PRG_DIR" && pwd`
+
+# restore original working dir
+cd "$WORKING_DIR"
+
+
+JAR_FILE="$APP_ROOT/FileBot.jar"
 echo "Update $JAR_FILE"
-curl -L -o "$JAR_FILE" -z "$JAR_FILE" "http://sourceforge.net/projects/filebot/files/filebot/HEAD/FileBot.jar"
+curl -L -o "$JAR_FILE" -z "$JAR_FILE" "http://sourceforge.net/projects/filebot/files/filebot/HEAD/FileBot.jar"
\ No newline at end of file