diff --git a/CMakeLists.txt b/CMakeLists.txt
index 646d52eb..3c18a9a8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -69,12 +69,6 @@ if (ADDITIONAL_PATHS)
   set(CMAKE_PREFIX_PATH ${ADDITIONAL_PATHS})
 endif (ADDITIONAL_PATHS)
 
-#######################################################################
-# install dir
-if(NOT INSTALL_DIR)
-    set(INSTALL_DIR "/opt/netgen" CACHE PATH "Prefix prepended to install directories")
-endif(NOT INSTALL_DIR)
-
 if(APPLE)
   set(CMAKE_INSTALL_PREFIX "${INSTALL_DIR}/Netgen.app/Contents/Resources" CACHE INTERNAL "Prefix prepended to install directories" FORCE)
 else(APPLE)
diff --git a/cmake_modules/SuperBuild.cmake b/cmake_modules/SuperBuild.cmake
index ee39bc00..eb800779 100644
--- a/cmake_modules/SuperBuild.cmake
+++ b/cmake_modules/SuperBuild.cmake
@@ -45,10 +45,11 @@ endif(WIN32)
 
 #######################################################################
 # find netgen
-set(INSTALL_DIR /opt/netgen CACHE PATH "Install path")
 if(APPLE)
+  set(INSTALL_DIR /Applications CACHE PATH "Install path")
   set(CMAKE_INSTALL_PREFIX "${INSTALL_DIR}/Netgen.app/Contents/Resources" CACHE INTERNAL "Prefix prepended to install directories" FORCE)
 else(APPLE)
+  set(INSTALL_DIR /opt/netgen CACHE PATH "Install path")
   set(CMAKE_INSTALL_PREFIX "${INSTALL_DIR}" CACHE INTERNAL "Prefix prepended to install directories" FORCE)
 endif(APPLE)
 if(UNIX)