diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5594cff69071ffeca359e3b60d14122fa2db77f6..14c3379b643e995986b979a091676543d613351f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -199,6 +199,11 @@ endif()
 #######################
 
 if(APPLE)
+  dd4hep_print("|++> BOOST_LIBRARY_DIR ${BOOST_LIBRARY_DIR}")
+  dd4hep_print("|++> Boost_LIBRARY_DIR ${Boost_LIBRARY_DIR}")
+  dd4hep_print("|++> BOOST_LIBRARY_DIRS ${BOOST_LIBRARY_DIRS}")
+  dd4hep_print("|++> Boost_LIBRARY_DIRS ${Boost_LIBRARY_DIRS}")
+
   fill_dd4hep_library_path()
   message(STATUS "DD4HEP_LIBRARY_PATH= $ENV{DD4HEP_LIBRARY_PATH}")
 endif()