--- v01-06/CMakeLists.txt.eigen	2020-03-18 23:35:32.000000000 +0900
+++ v01-06/CMakeLists.txt	2020-03-19 09:11:47.000000000 +0900
@@ -119,10 +119,17 @@
     ADD_DEFINITIONS( "-DUSE_GBL" )
     #this construct to find the GBL version is neccessary since the GBL cmake package
     #currently does not export its version number variable correctly
-    file(GLOB GBLLIBS "${GBL_DIR}/lib/libGBL.so*")
-    STRING(REGEX REPLACE ".*so[.]([0-9]+).*" "\\1" GBLVERSIONMAJOR "${GBLLIBS}")
-    STRING(REGEX REPLACE ".*so[.]([0-9]+[.][0-9]+[.][0-9]+)" "\\1" GBLLIBVERSION "${GBLLIBS}")
-    MESSAGE(STATUS "GBL library version " ${GBLLIBVERSION})
+    if( NOT APPLE )
+       file(GLOB GBLLIBS "${GBL_DIR}/lib/libGBL.so*")
+       STRING(REGEX REPLACE ".*so[.]([0-9]+).*" "\\1" GBLVERSIONMAJOR "${GBLLIBS}")
+       STRING(REGEX REPLACE ".*so[.]([0-9]+[.][0-9]+[.][0-9]+)" "\\1" GBLLIBVERSION "${GBLLIBS}")
+       MESSAGE(STATUS "GBL library version " ${GBLLIBVERSION})
+    ELSE()
+       file(GLOB GBLLIBS "${GBL_DIR}/lib/libGBL.*dylib")
+       STRING(REGEX REPLACE "[^.]*[.]([0-9]+).*" "\\1" GBLVERSIONMAJOR "${GBLLIBS}")
+       STRING(REGEX REPLACE "[^.]*[.]([0-9]+[.][0-9]+[.][0-9]+)[.]dylib" "\\1" GBLLIBVERSION "${GBLLIBS}")
+       MESSAGE(STATUS "GBL library version " ${GBLLIBVERSION})
+    ENDIF()
     if ( GBLVERSIONMAJOR GREATER "1" )
         MESSAGE(STATUS "Use FindEigen3.cmake from this GBL_DIR: " ${GBL_DIR}/cmake)
         LIST( APPEND CMAKE_MODULE_PATH ${GBL_DIR}/cmake )