diff --git a/Makefile b/Makefile
index 7907d0540c..154abf503d 100644
--- a/Makefile
+++ b/Makefile
@@ -475,6 +475,12 @@ LIBS += $(shell $(LIBPNG-CONFIG)  --L_opts $(PNGCONFIG_FLAGS))
 endif
 endif
 
+ifdef OSX
+ifndef JAGUAR
+LIBS += -liconv
+endif
+endif
+
 # enables/disables assert()
 ifdef DISABLE_ASSERTS
 CFLAGS += -DNDEBUG
diff --git a/network_core.h b/network_core.h
index 98dcea13aa..7a9dd4e420 100644
--- a/network_core.h
+++ b/network_core.h
@@ -11,13 +11,10 @@
 
 #ifdef ENABLE_NETWORK
 
-#ifdef __APPLE__
-#include <AvailabilityMacros.h>
-#if (MAC_OS_X_VERSION_MAX_ALLOWED == MAC_OS_X_VERSION_10_2)
+#if defined(__APPLE__) && (MAC_OS_X_VERSION_MAX_ALLOWED == MAC_OS_X_VERSION_10_2)
 	// OSX 10.2 don't have socklen_t defined, so we will define it here
 	typedef int socklen_t;
 #endif
-#endif
 
 // Windows stuff
 #if defined(WIN32) || defined(WIN64)
diff --git a/os/macosx/Makefile.setup b/os/macosx/Makefile.setup
index c2531815ff..c33c877e5d 100644
--- a/os/macosx/Makefile.setup
+++ b/os/macosx/Makefile.setup
@@ -108,3 +108,16 @@ $(error no x86 libpng found)
 		LDFLAGS:= $(LDFLAGS_PPC)
 	endif
 endif
+
+# setting up flags to make a binary, that fits the system it builds on
+ifndef FAT_BINARY
+	ifndef JAGUAR
+		ifeq ($(shell uname), Darwin)
+			# it's a hardware mac, not crosscompiling
+			ifeq ($(shell uname -r), 6.8)
+			# OSX 10.2.8 uses Darwin 6.8, so we better set JAGUAR so we avoid the stuff that was added in 10.3 or later
+				JAGUAR:=1
+			endif
+		endif
+	endif
+endif
diff --git a/saveload.c b/saveload.c
index 5e0988a60f..f35b77407b 100644
--- a/saveload.c
+++ b/saveload.c
@@ -1243,6 +1243,12 @@ extern bool AfterLoadGame(void);
 extern void BeforeSaveGame(void);
 extern bool LoadOldSaveGame(const char *file);
 
+#if defined(__APPLE__) && (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_3)
+extern const char *convert_to_fs_charset(const char *filename);
+#else
+#define convert_to_fs_charset(str) (str)
+#endif
+
 /** Small helper function to close the to be loaded savegame an signal error */
 static inline SaveOrLoadResult AbortSaveLoad(void)
 {
@@ -1347,7 +1353,6 @@ void WaitTillSaved(void)
 	save_thread = NULL;
 }
 
-
 /**
  * Main Save or Load function where the high-level saveload functions are
  * handled. It opens the savegame, selects format and checks versions
@@ -1378,7 +1383,11 @@ SaveOrLoadResult SaveOrLoad(const char *filename, int mode)
 		return SL_OK;
 	}
 
-	_sl.fh = fopen(filename, (mode == SL_SAVE) ? "wb" : "rb");
+	if(mode == SL_SAVE) {
+		_sl.fh = fopen(convert_to_fs_charset(filename), "wb");
+	} else {
+		_sl.fh = fopen(filename, "rb");
+	}
 	if (_sl.fh == NULL) {
 		DEBUG(misc, 0) ("Cannot open savegame for saving/loading.");
 		return SL_ERROR;
diff --git a/screenshot.c b/screenshot.c
index ad32f20c13..963c5cff36 100644
--- a/screenshot.c
+++ b/screenshot.c
@@ -12,6 +12,12 @@
 #include "screenshot.h"
 #include "variables.h"
 
+#if defined(__APPLE__) && (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_3)
+extern const char *convert_to_fs_charset(const char *filename);
+#else
+#define convert_to_fs_charset(str) (str)
+#endif
+
 char _screenshot_format_name[8];
 uint _num_screenshot_formats;
 uint _cur_screenshot_format;
@@ -73,7 +79,7 @@ static bool MakeBmpImage(const char *name, ScreenshotCallback *callb, void *user
 	if (pixelformat != 8)
 		return false;
 
-	f = fopen(name, "wb");
+	f = fopen(convert_to_fs_charset(name), "wb");
 	if (f == NULL) return false;
 
 	// each scanline must be aligned on a 32bit boundary
@@ -177,7 +183,7 @@ static bool MakePNGImage(const char *name, ScreenshotCallback *callb, void *user
 	if (pixelformat != 8)
 		return false;
 
-	f = fopen(name, "wb");
+	f = fopen(convert_to_fs_charset(name), "wb");
 	if (f == NULL) return false;
 
 	png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, (char *)name, png_my_error, png_my_warning);
@@ -288,7 +294,7 @@ static bool MakePCXImage(const char *name, ScreenshotCallback *callb, void *user
 	if (pixelformat != 8 || w == 0)
 		return false;
 
-	f = fopen(name, "wb");
+	f = fopen(convert_to_fs_charset(name), "wb");
 	if (f == NULL) return false;
 
 	memset(&pcx, 0, sizeof(pcx));
diff --git a/unix.c b/unix.c
index 984c6a88e8..ee0074b657 100644
--- a/unix.c
+++ b/unix.c
@@ -48,7 +48,6 @@ ULONG __stack = (1024*1024)*2; // maybe not that much is needed actually ;)
 		#include <SDL.h>
 	#endif
 #endif
-
 static char *_fios_path;
 static char *_fios_save_path;
 static char *_fios_scn_path;
@@ -604,3 +603,43 @@ void CSleep(int milliseconds)
 	}
 	#endif // __AMIGA__
 }
+
+#if defined(__APPLE__) && (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_3)
+/* FYI: This is not thread-safe.
+Assumptions:
+	- the 'from' charset is ISO-8859-15
+	- the 'to' charset is either the same, or UTF-8
+NOTE: iconv was added in OSX 10.3. 10.2.x will still have the invalid char issues. There aren't any easy fix for this
+*/
+#include <iconv.h>
+#include <locale.h>
+const char *convert_to_fs_charset(const char *filename)
+{
+	static char statout[1024], statin[1024];
+	static iconv_t convd;
+	static bool alreadyInited;
+	char *outbuf = statout;
+	const char *inbuf = statin;
+	size_t inlen = strlen(filename), outlen = 1023;
+	size_t retval = 0;
+	if(inbuf == NULL)
+		inbuf = statin;
+
+	setlocale(LC_ALL, "C-UTF-8");
+	strcpy(statout, filename);
+	strcpy(statin, filename);
+	inbuf = strrchr(statin, '/');
+	outbuf = strrchr(statout, '/');
+	if(alreadyInited == false)
+	{
+		convd = iconv_open("UTF-8", "ISO-8859-15");
+		if(convd == (iconv_t)(-1))
+			return filename;
+		alreadyInited = true;
+	}
+	retval = iconv(convd, NULL, NULL, NULL, NULL);
+	inlen = iconv(convd, &inbuf, &inlen, &outbuf, &outlen);
+	// FIX: invalid characters will abort conversion, but they shouldn't occur?
+	return statout;
+}
+#endif