diff --git a/BasiliskII/src/Unix/main_unix.cpp b/BasiliskII/src/Unix/main_unix.cpp
index 32900546..b076f46e 100755
--- a/BasiliskII/src/Unix/main_unix.cpp
+++ b/BasiliskII/src/Unix/main_unix.cpp
@@ -30,7 +30,7 @@
 # include <SDL.h>
 # include <SDL_main.h>
 #if !SDL_VERSION_ATLEAST(3, 0, 0)
-#define __MACOS__	__MACOSX__
+#define SDL_PLATFORM_MACOS	__MACOSX__
 #endif
 #endif
 
@@ -46,8 +46,8 @@
 # include <sys/mman.h>
 #endif
 
-#if __MACOS__
-# include "utils_macosx.h"
+#if SDL_PLATFORM_MACOS
+#include "utils_macosx.h"
 #endif
 
 #if !EMULATED_68K && defined(__NetBSD__)
@@ -571,7 +571,7 @@ int main(int argc, char **argv)
 	}
 	atexit(SDL_Quit);
 
-#if __MACOS__ && SDL_VERSION_ATLEAST(2,0,0)
+#if SDL_PLATFORM_MACOS && SDL_VERSION_ATLEAST(2,0,0)
 	// On Mac OS X hosts, SDL2 will create its own menu bar.  This is mostly OK,
 	// except that it will also install keyboard shortcuts, such as Command + Q,
 	// which can interfere with keyboard shortcuts in the guest OS.
@@ -695,7 +695,7 @@ int main(int argc, char **argv)
 	ROMBaseMac = Host2MacAddr(ROMBaseHost);
 #endif
 
-#if __MACOS__
+#if SDL_PLATFORM_MACOS
 	extern void set_current_directory();
 	set_current_directory();
 #endif
diff --git a/SheepShaver/src/Unix/main_unix.cpp b/SheepShaver/src/Unix/main_unix.cpp
index 15fce115..d9dae957 100755
--- a/SheepShaver/src/Unix/main_unix.cpp
+++ b/SheepShaver/src/Unix/main_unix.cpp
@@ -125,12 +125,19 @@
 
 #ifdef USE_SDL
 #include <SDL.h>
+#if !SDL_VERSION_ATLEAST(3, 0, 0)
+#define SDL_PLATFORM_MACOS      __MACOSX__
+#endif
 #endif
 
 #ifndef USE_SDL_VIDEO
 #include <X11/Xlib.h>
 #endif
 
+#if SDL_PLATFORM_MACOS
+#include "utils_macosx.h"
+#endif
+
 #ifdef ENABLE_GTK
 #include <gtk/gtk.h>
 #if !defined(GDK_WINDOWING_QUARTZ) && !defined(GDK_WINDOWING_WAYLAND)
@@ -773,8 +780,7 @@ int main(int argc, char **argv)
 #endif
 #endif
 
-#if __MACOSX__
-	extern void set_current_directory();
+#if SDL_PLATFORM_MACOS
 	set_current_directory();
 #endif
 	
@@ -864,17 +870,14 @@ int main(int argc, char **argv)
 	// Read preferences
 	PrefsInit(vmdir, argc, argv);
 
-#ifdef __MACOSX__
-#if SDL_VERSION_ATLEAST(2,0,0)
+#if SDL_PLATFORM_MACOS && SDL_VERSION_ATLEAST(2,0,0)
 	// On Mac OS X hosts, SDL2 will create its own menu bar.  This is mostly OK,
 	// except that it will also install keyboard shortcuts, such as Command + Q,
 	// which can interfere with keyboard shortcuts in the guest OS.
 	//
 	// HACK: disable these shortcuts, while leaving all other pieces of SDL2's
 	// menu bar in-place.
-	extern void disable_SDL2_macosx_menu_bar_keyboard_shortcuts();
 	disable_SDL2_macosx_menu_bar_keyboard_shortcuts();
-#endif
 #endif
 	
 	// Any command line arguments left?