diff --git a/configureAppSandboxing.sh b/configureAppSandboxing.sh
new file mode 100755
index 0000000..0908a3f
--- /dev/null
+++ b/configureAppSandboxing.sh
@@ -0,0 +1,44 @@
+#!/bin/bash
+
+appSandboxing=false
+defineSandboxing=false
+
+if [ "$1" == "YES" ]
+then
+	appSandboxing=true
+	defineSandboxing=false
+elif [ "$1" == "NO" ]
+then
+	appSandboxing=false
+	defineSandboxing=false
+elif [ "$1" == "SANDBOXING" ]
+then
+	appSandboxing=true
+	defineSandboxing=true
+else
+	echo "Run with parameter YES or NO to enable or disable app sandboxing."
+	echo "Or with parameter SANDBOXING to enable or app sandboxing and define SANDBOXING"
+	echo "  in the prefix header."
+	exit -1
+fi
+
+if [ "$defineSandboxing" == "true" ]
+then
+	sed -i '' 's|^//\(#define SANDBOXING\) *$|\1|' Flycut_Prefix.pch
+	git add Flycut_Prefix.pch
+else
+	sed -i '' 's|^\(#define SANDBOXING\) *$|//\1|' Flycut_Prefix.pch
+	git add Flycut_Prefix.pch
+fi
+
+for key in com.apple.security.app-sandbox com.apple.security.files.user-selected.read-write
+do
+	for entitlements in $(git grep -l -e ">$key<")
+	do
+		/usr/libexec/PlistBuddy -c "Set :$key $appSandboxing" "$entitlements"
+		git add "$entitlements"
+	done
+done
+
+git commit -m "App Sandbox $(if [ "$appSandboxing" == "true" ] ; then echo "ON" ; else echo "OFF" ; fi)$(if [ "$defineSandboxing" == "true" ] ; then echo " with define" ; fi)"
+