diff --git a/include/config.h b/include/config.h
index b12ac77cb..4e3a0e2c7 100644
--- a/include/config.h
+++ b/include/config.h
@@ -198,7 +198,11 @@
  * otherwise it will be the current directory.
  */
 # ifndef HACKDIR
-#  define HACKDIR "/usr/games/lib/nethackdir"	/* nethack directory */
+#  ifdef __APPLE__
+#    define HACKDIR "nethackdir"	/* nethack directory */
+#  else
+#    define HACKDIR "/usr/games/lib/nethackdir"
+#  endif
 # endif
 
 /*
diff --git a/src/hacklib.c b/src/hacklib.c
index dc074ec21..768dfbc6e 100644
--- a/src/hacklib.c
+++ b/src/hacklib.c
@@ -452,7 +452,7 @@ setrandom()
 #ifdef RANDOM	/* srandom() from sys/share/random.c */
 	srandom((unsigned int) time((time_t *)0));
 #else
-# if defined(BSD) || defined(ULTRIX) || defined(CYGWIN32) /* system srandom() */
+# if defined(__APPLE__) || defined(BSD) || defined(ULTRIX) || defined(CYGWIN32) /* system srandom() */
 #  ifdef BSD
 #   if defined(SUNOS4)
 	(void)
diff --git a/sys/unix/unixmain.c b/sys/unix/unixmain.c
index 9208448c4..a5b0a0dcc 100644
--- a/sys/unix/unixmain.c
+++ b/sys/unix/unixmain.c
@@ -60,7 +60,7 @@ char *argv[];
 	   running from finder --sam */
 #define MAC_PATH_VALUE ".app/Contents/MacOS/"
 	char mac_cwd[1024], *mac_exe = argv[0], *mac_tmp;
-	int arg0_len = strlen(mac_exe), mac_tmp_len;
+	int arg0_len = strlen(mac_exe), mac_tmp_len, mac_lhs_len=0;
 	getcwd(mac_cwd, 1024);
 	if(mac_exe[0] == '/' && !strcmp(mac_cwd, "/")) {
 	    if((mac_exe = strrchr(mac_exe, '/')))
@@ -72,10 +72,11 @@ char *argv[];
 		mac_tmp = malloc(mac_tmp_len + 1);
 		sprintf(mac_tmp, "%s%s%s", mac_exe, MAC_PATH_VALUE, mac_exe);
 		if(!strcmp(argv[0] + (arg0_len - mac_tmp_len), mac_tmp)) {
-		    if(arg0_len - mac_tmp_len > mac_tmp_len - 1)
-			mac_tmp = realloc(mac_tmp, arg0_len - mac_tmp_len);
-		    strncpy(mac_tmp, argv[0], arg0_len - mac_tmp_len);
-		    mac_tmp[arg0_len - mac_tmp_len] = '\0';
+		    mac_lhs_len = (arg0_len - mac_tmp_len) + strlen(mac_exe) + 5;
+		    if(mac_lhs_len > mac_tmp_len - 1)
+			mac_tmp = realloc(mac_tmp, mac_lhs_len);
+		    strncpy(mac_tmp, argv[0], mac_lhs_len);
+		    mac_tmp[mac_lhs_len] = '\0';
 		    chdir(mac_tmp);
 		}
 		free(mac_tmp);
diff --git a/win/Qt/qt_win.cpp b/win/Qt/qt_win.cpp
index 89d9235d4..1705720db 100644
--- a/win/Qt/qt_win.cpp
+++ b/win/Qt/qt_win.cpp
@@ -99,7 +99,11 @@ extern "C" {
 #include "qt_xpms.h"
 
 #include <dirent.h>
-#include <malloc.h>
+#ifdef Q_WS_MACX
+#  include <sys/malloc.h>
+#else
+#  include <malloc.h>
+#endif
 
 #ifdef _WS_X11_
 // For userid control