diff --git a/BasiliskII/src/Unix/Makefile.in b/BasiliskII/src/Unix/Makefile.in
index 21a0e6da..c52eab26 100644
--- a/BasiliskII/src/Unix/Makefile.in
+++ b/BasiliskII/src/Unix/Makefile.in
@@ -130,6 +130,9 @@ $(APP)_app: $(APP) $(OSX_DOCS) ../../README ../MacOSX/Info.plist ../MacOSX/$(APP
 	./cpr.sh ../MacOSX/English.lproj $(APP_APP)/Contents/Resources/
 	cp -f $(OSX_DOCS) $(APP_APP)/Contents/Resources/
 	cp -f ../../README $(APP_APP)/Contents/Resources/README.txt
+ifeq (@MACOSX_ETHERHELPER@,yes)
+	cp -f etherhelpertool $(APP_APP)/Contents/Resources
+endif
 
 $(GUI_APP)_app: $(GUI_APP) ../MacOSX/Info.plist ../MacOSX/$(APP).icns
 	rm -rf $(GUI_APP_APP)/Contents
diff --git a/BasiliskII/src/Unix/main_unix.cpp b/BasiliskII/src/Unix/main_unix.cpp
index 3505335e..19e744b2 100644
--- a/BasiliskII/src/Unix/main_unix.cpp
+++ b/BasiliskII/src/Unix/main_unix.cpp
@@ -404,6 +404,8 @@ int main(int argc, char **argv)
 			if (i < argc)
 				x_display_name = strdup(argv[i]);
 #endif
+		} else if (strncmp(argv[i], "-psn_", 5) == 0) {// OS X process identifier
+			argv[i++] = NULL;
 		} else if (strcmp(argv[i], "--gui-connection") == 0) {
 			argv[i++] = NULL;
 			if (i < argc) {