diff --git a/makefile.darwin.clang.x86_64 b/makefile.darwin.clang.x86_64
index 5a0dd466..9649f0e0 100644
--- a/makefile.darwin.clang.x86_64
+++ b/makefile.darwin.clang.x86_64
@@ -30,7 +30,7 @@ CCOPT = -fPIC $(INCLUDEPATH) -g
 
 CC = cc $(CCOPT) -c 
 CL = cc $(CCOPT) 
-LD = cc -dynamiclib -o $(LIBRARY).dylib
+LD = libtool -dynamic -lSystem -compatibility_version $(RELEASE) -current_version $(RELEASE) -install_name $(PREFIX)/lib/$(LIBRARY).dylib -o $(LIBRARY).dylib
 # s is necessary to create index inside a archive
 ARCHIVE = ar rcs $(LIBRARY).a
 
diff --git a/ocat b/ocat
index 53abd573..a4727826 100755
Binary files a/ocat and b/ocat differ
diff --git a/showdef b/showdef
index e8af78b5..3ef157af 100755
Binary files a/showdef and b/showdef differ
diff --git a/src/voc/darwin/clang/extTools.Mod b/src/voc/darwin/clang/extTools.Mod
index 0dda5009..d8d03c6d 100644
--- a/src/voc/darwin/clang/extTools.Mod
+++ b/src/voc/darwin/clang/extTools.Mod
@@ -33,6 +33,8 @@ cc : ARRAY 1023 OF CHAR;
 ccopt : ARRAY 1023 OF CHAR;
 cmd : ARRAY 1023 OF CHAR;
 ext : ARRAY 5 OF CHAR;
+
+cmd2 : ARRAY 1023 OF CHAR;
 BEGIN
 (*
 gcc -g -o hello hello.c -I $RPATH/src/lib/system/linux/gnuc/x86_64 -I. -I$RPATH -lOberon -L. -L$RPATH -static
@@ -46,13 +48,34 @@ Strings.Append(" ", cmd);
 Strings.Append(m, cmd);
 Strings.Append(ext, cmd);
 Strings.Append(additionalopts, cmd);
-IF statically THEN Strings.Append(" -static ", cmd) END;
+Strings.Append(" ", cmd);
+(*IF statically THEN Strings.Append(" -static ", cmd) END;*)
+IF statically THEN 
+   Strings.Append(version.prefix, cmd);
+   Strings.Append("/lib/libVishapOberon.a ", cmd);
+END;
 Strings.Append(" -o ", cmd);
 Strings.Append(m, cmd);
 Strings.Append(" ", cmd);
+IF ~statically THEN
+Strings.Append ("-lVishapOberon -L. -L", ccOpt);
+Strings.Append (version.prefix, ccOpt);
+Strings.Append ("/lib ", ccOpt);
+END;
 Strings.Append(ccOpt, cmd);
+
 Console.Ln; Console.String(cmd); Console.Ln; (* may be it's feasible to add debug mode later *)
 Unix.system(cmd);
+
+IF ~statically THEN
+   cmd2 := "";
+   COPY ("install_name_tool -change libVishapOberon.dylib ", cmd2);
+   Strings.Append(version.prefix, cmd2);
+   Strings.Append ("/lib/libVishapOberon.dylib ", cmd2);
+   Strings.Append (m, cmd2);
+   Console.String(cmd2); Console.Ln;
+   Unix.system(cmd2);
+   END
 END LinkMain;
 
 BEGIN
@@ -70,9 +93,6 @@ Strings.Append(version.prefix, tmp1);
 Strings.Append("/", tmp1);
 Strings.Append(incPath1, tmp1);
 Strings.Append(tmp1, ccOpt);
-Strings.Append ("-lVishapOberon -L. -L", ccOpt);
-Strings.Append (version.prefix, ccOpt);
-Strings.Append ("/lib ", ccOpt);
 Args.GetEnv("CFLAGS", CFLAGS);
 Strings.Append (CFLAGS, ccOpt);
 Strings.Append (" ", ccOpt);
diff --git a/voc b/voc
index 5bcb7b99..e91f0b6f 100755
Binary files a/voc and b/voc differ