diff -Naur pstree-2.17.old/pstree.c pstree-2.17.new/pstree.c
--- pstree-2.17.old/pstree.c	Mon Dec 17 21:18:02 2001
+++ pstree-2.17.new/pstree.c	Sun Apr  7 05:15:36 2002
@@ -165,7 +165,7 @@
 #  define UID2USER
 #  define PSCMD 	"ps laxw"
 #  define PSFORMAT 	"%ld %ld %ld %*d %*d %*d %*d %*d %*s %*s %*s %*s %[^\n]"
-#elif defined(__FreeBSD__) /* FreeBSD  */
+#elif defined(__FreeBSD__) || defined(__APPLE__) /* FreeBSD  */
 /* FreeBSD contributed by Randall Hopper <rhh@ct.picker.com> */
 #  define PSCMD 	"ps -axo \"user pid ppid command\""
 #  define PSFORMAT 	"%s %d %d %[^\n]"