diff --git i/base/unix-dll.mak w/base/unix-dll.mak
index f50c09c00adb..8855133b400c 100644
--- i/base/unix-dll.mak
+++ w/base/unix-dll.mak
@@ -89,18 +89,33 @@ GPDL_SONAME_MAJOR_MINOR=$(GPDL_SONAME_BASE)$(GS_SOEXT)$(SO_LIB_VERSION_SEPARATOR
 # similar linkers it must containt the trailing "="
 # LDFLAGS_SO=-shared -Wl,$(LD_SET_DT_SONAME)$(LDFLAGS_SO_PREFIX)$(GS_SONAME_MAJOR)
 
 
 # MacOS X
-#GS_SOEXT=dylib
-#GS_SONAME=$(GS_SONAME_BASE).$(GS_SOEXT)
-#GS_SONAME_MAJOR=$(GS_SONAME_BASE).$(GS_VERSION_MAJOR).$(GS_SOEXT)
-#GS_SONAME_MAJOR_MINOR=$(GS_SONAME_BASE).$(GS_VERSION_MAJOR).$(GS_VERSION_MINOR).$(GS_SOEXT)
+GS_SOEXT=dylib
+GS_SONAME=$(GS_SONAME_BASE).$(GS_SOEXT)
+GS_SONAME_MAJOR=$(GS_SONAME_BASE).$(GS_VERSION_MAJOR).$(GS_SOEXT)
+GS_SONAME_MAJOR_MINOR=$(GS_SONAME_BASE).$(GS_VERSION_MAJOR).$(GS_VERSION_MINOR).$(GS_SOEXT)
 #LDFLAGS_SO=-dynamiclib -flat_namespace
-#LDFLAGS_SO_MAC=-dynamiclib -install_name $(GS_SONAME_MAJOR_MINOR)
+GS_LDFLAGS_SO=-dynamiclib -install_name $(GS_SONAME_MAJOR_MINOR)
 #LDFLAGS_SO=-dynamiclib -install_name $(FRAMEWORK_NAME)
 
+PCL_SONAME=$(PCL_SONAME_BASE).$(GS_SOEXT)
+PCL_SONAME_MAJOR=$(PCL_SONAME_BASE).$(GS_VERSION_MAJOR).$(GS_SOEXT)
+PCL_SONAME_MAJOR_MINOR=$(PCL_SONAME_BASE).$(GS_VERSION_MAJOR).$(GS_VERSION_MINOR).$(GS_SOEXT)
+PCL_LDFLAGS_SO=-dynamiclib -install_name $(PCL_SONAME_MAJOR_MINOR)
+
+XPS_SONAME=$(XPS_SONAME_BASE).$(GS_SOEXT)
+XPS_SONAME_MAJOR=$(XPS_SONAME_BASE).$(GS_VERSION_MAJOR).$(GS_SOEXT)
+XPS_SONAME_MAJOR_MINOR=$(XPS_SONAME_BASE).$(GS_VERSION_MAJOR).$(GS_VERSION_MINOR).$(GS_SOEXT)
+XPS_LDFLAGS_SO=-dynamiclib -install_name $(XPS_SONAME_MAJOR_MINOR)
+
+GPDL_SONAME=$(GPDL_SONAME_BASE).$(GS_SOEXT)
+GPDL_SONAME_MAJOR=$(GPDL_SONAME_BASE).$(GS_VERSION_MAJOR).$(GS_SOEXT)
+GPDL_SONAME_MAJOR_MINOR=$(GPDL_SONAME_BASE).$(GS_VERSION_MAJOR).$(GS_VERSION_MINOR).$(GS_SOEXT)
+GPDL_LDFLAGS_SO=-dynamiclib -install_name $(GPDL_SONAME_MAJOR_MINOR)
+
 GS_SO=$(BINDIR)/$(GS_SONAME)
 GS_SO_MAJOR=$(BINDIR)/$(GS_SONAME_MAJOR)
 GS_SO_MAJOR_MINOR=$(BINDIR)/$(GS_SONAME_MAJOR_MINOR)

 PCL_SO=$(BINDIR)/$(PCL_SONAME)