diff -uNr libdv-0.104/encodedv/dvconnect.c libdv-0.104-new/encodedv/dvconnect.c
--- libdv-0.104/encodedv/dvconnect.c	2004-05-30 22:05:23.000000000 -0400
+++ libdv-0.104-new/encodedv/dvconnect.c	2005-04-28 10:43:43.000000000 -0400
@@ -857,12 +857,13 @@
 
 int rt_raisepri (int pri)
 {
-#ifdef _SC_PRIORITY_SCHEDULING
+#if defined(_SC_PRIORITY_SCHEDULING) && !defined(__APPLE__)
 	struct sched_param scp;
 
 	/*
 	 * Verify that scheduling is available
 	 */
+#if defined(_SC_PRIORITY_SCHEDULING) && !defined(__APPLE__)
 	if (sysconf (_SC_PRIORITY_SCHEDULING) == -1) {
 		fprintf (stderr, "WARNING: RR-scheduler not available, "
 			 "disabling.\n");
@@ -877,6 +878,11 @@
 	}
 #endif
 	return (0);
+#else
+		fprintf (stderr, "WARNING: RR-scheduler not available, "
+			"disabling.\n");
+		return (-1);
+#endif
 }
 
 /* ------------------------------------------------------------------------