diff --git a/extdep/CMakeLists.txt b/extdep/CMakeLists.txt
index 642e10eee..8f38cd1bf 100644
--- a/extdep/CMakeLists.txt
+++ b/extdep/CMakeLists.txt
@@ -34,7 +34,8 @@ else()
 	eth_download(json-rpc-cpp VERSION 0.3.2)
 	eth_download(qt)
 	eth_download(cryptopp)
-	eth_download(snappy)
+	eth_download(snappy
+		OSX_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/scripts/snappy_osx.sh)
 	eth_download(leveldb)
 
 	#include(compile/leveldb.cmake)
diff --git a/extdep/eth_download.cmake b/extdep/eth_download.cmake
index 1567eafaa..0b4d6b6fb 100644
--- a/extdep/eth_download.cmake
+++ b/extdep/eth_download.cmake
@@ -48,6 +48,8 @@ macro(eth_download eth_package_name)
 
 	if (eth_package_install)
 		message(STATUS "install script is at: ${eth_package_install}")
+	else ()
+		set (eth_package_install echo 0) # cause empty string is not handled properly
 	endif()
 
 	ExternalProject_Add(${eth_package_name}
@@ -55,7 +57,7 @@ macro(eth_download eth_package_name)
 		BINARY_DIR ${eth_package_name}-prefix/src/${eth_package_name}
 		CONFIGURE_COMMAND ""
 		BUILD_COMMAND ${eth_package_copy}
-		INSTALL_COMMAND ${eth_package_install}
+		INSTALL_COMMAND ${eth_package_install} . ${ETH_DEPENDENCY_INSTALL_DIR}
 	)
 endmacro()
 
diff --git a/extdep/scripts/snappy_osx.sh b/extdep/scripts/snappy_osx.sh
new file mode 100755
index 000000000..01304fcf1
--- /dev/null
+++ b/extdep/scripts/snappy_osx.sh
@@ -0,0 +1,8 @@
+#!/bin/bash
+
+ETH_DEPENDENCY_SOURCE_DIR=$1
+ETH_DEPENDENCY_INSTALL_DIR=$2
+
+SNAPPY_DYLIB=${ETH_DEPENDENCY_INSTALL_DIR}/lib/libsnappy.dylib 
+install_name_tool -id ${SNAPPY_DYLIB} ${SNAPPY_DYLIB}
+