diff --git a/Makefile b/Makefile
index f932edc1..c2208794 100644
--- a/Makefile
+++ b/Makefile
@@ -93,7 +93,7 @@ NATIVE_DEFINES_$(CONFIG_BSD) += -DTARGETOS_$(TARGETOS)
 NATIVE_DEFINES_$(CONFIG_Android) += -DTARGETOS_ANDROID
 NATIVE_DEFINES_$(CONFIG_pie) += -DCONFIG_TCC_PIE
 NATIVE_DEFINES_$(CONFIG_pic) += -DCONFIG_TCC_PIC
-NATIVE_DEFINES_$(CONFIG_new_macho) += -DCONFIG_NEW_MACHO
+NATIVE_DEFINES_no_$(CONFIG_new_macho) += -DCONFIG_NEW_MACHO=0
 NATIVE_DEFINES_$(CONFIG_codesign) += -DCONFIG_CODESIGN
 NATIVE_DEFINES_$(CONFIG_new-dtags) += -DCONFIG_NEW_DTAGS
 NATIVE_DEFINES_no_$(CONFIG_bcheck) += -DCONFIG_TCC_BCHECK=0
diff --git a/configure b/configure
index bc0d3e5d..29277969 100755
--- a/configure
+++ b/configure
@@ -70,6 +70,7 @@ case $targetos in
     cc=`readlink $cc || echo clang`
     tcc_usrinclude="`xcrun --show-sdk-path`/usr/include"
     DLLSUF=".dylib"
+    dwarf=4
     ;;
   Windows_NT|MINGW*|MSYS*|CYGWIN*)
     mingw32=yes
@@ -350,7 +351,7 @@ Advanced options (experts only):
   --config-backtrace=no    disable stack backtraces (with -run or -bt)
   --config-bcheck=no       disable bounds checker (-b)
   --config-predefs=no      do not compile tccdefs.h, instead just include
-  --config-new_macho       Use apple new macho object format
+  --config-new_macho=no    Use apple old macho object format
   --config-codesign        Use codesign on apple to sign executables
   --dwarf=x                Use dwarf debug info instead of stabs (x=2..5)
 EOF
diff --git a/tcc.h b/tcc.h
index 2c2e086b..144cc4bf 100644
--- a/tcc.h
+++ b/tcc.h
@@ -213,6 +213,12 @@ extern long double strtold (const char *__nptr, char **__endptr);
 #  define CONFIG_TCC_BCHECK 1 /* enable bound checking code */
 #endif
 
+#if defined CONFIG_NEW_MACHO && CONFIG_NEW_MACHO==0
+#  undef CONFIG_NEW_MACHO
+#else
+#  define CONFIG_NEW_MACHO 1 /* enable new macho code */
+#endif
+
 #if defined TARGETOS_OpenBSD \
     || defined TARGETOS_FreeBSD \
     || defined TARGETOS_NetBSD \