diff --git a/edge.c b/edge.c
index c5184ca..c4889c8 100644
--- a/edge.c
+++ b/edge.c
@@ -140,7 +140,9 @@ static void help() {
 	 "-l <supernode host:port>\n"
 	 "    "
 	 "[-p <local port>] [-M <mtu>] "
+#ifndef __APPLE__
 	 "[-D] "
+#endif
 	 "[-r] [-E] [-v] [-i <reg_interval>] [-t <mgmt port>] [-A] [-h]\n\n");
 
 #if defined(N2N_CAN_NAME_IFACE)
@@ -164,8 +166,10 @@ static void help() {
   printf("-m <MAC address>         | Fix MAC address for the TAP interface (otherwise it may be random)\n"
          "                         | eg. -m 01:02:03:04:05:06\n");
   printf("-M <mtu>                 | Specify n2n MTU of edge interface (default %d).\n", DEFAULT_MTU);
+#ifndef __APPLE__
   printf("-D                       | Enable PMTU discovery. PMTU discovery can reduce fragmentation but\n"
          "                         | causes connections stall when not properly supported.\n");
+#endif
   printf("-r                       | Enable packet forwarding through n2n community.\n");
 #ifdef N2N_HAVE_AES
   printf("-A                       | Use AES CBC for encryption (default=use twofish).\n");
@@ -253,11 +257,13 @@ static int setOption(int optkey, char *optargument, n2n_priv_config_t *ec, n2n_e
       break;
     }
 
+#ifndef __APPLE__
   case 'D' : /* enable PMTU discovery */
     {
       conf->disable_pmtu_discovery = 0;
       break;
     }
+#endif
 
   case 'k': /* encrypt key */
     {
diff --git a/edge_utils.c b/edge_utils.c
index 9e7dc0a..c20b2b0 100644
--- a/edge_utils.c
+++ b/edge_utils.c
@@ -1816,6 +1816,7 @@ static int edge_init_sockets(n2n_edge_t *eee, int udp_local_port, int mgmt_port,
       traceEvent(TRACE_ERROR, "Could not set TOS 0x%x[%d]: %s", tos, errno, strerror(errno));
   }
 
+#ifndef __APPLE__
   sockopt = (eee->conf.disable_pmtu_discovery) ? IP_PMTUDISC_DONT : IP_PMTUDISC_DO;
 
   if(setsockopt(eee->udp_sock, IPPROTO_IP, IP_MTU_DISCOVER, &sockopt, sizeof(sockopt)) < 0)
@@ -1823,6 +1824,7 @@ static int edge_init_sockets(n2n_edge_t *eee, int udp_local_port, int mgmt_port,
       (eee->conf.disable_pmtu_discovery) ? "disable" : "enable", errno, strerror(errno));
   else
     traceEvent(TRACE_DEBUG, "PMTU discovery %s", (eee->conf.disable_pmtu_discovery) ? "disabled" : "enabled");
+#endif
 
   eee->udp_mgmt_sock = open_socket(mgmt_port, 0 /* bind LOOPBACK */);
   if(eee->udp_mgmt_sock < 0) {