Apple build fix

src/device/mouse_serial.c

@@ -507,7 +507,9 @@ sermouse_command_timer(void *priv)
             break;
         case PHASE_ACK:
             serial_write_fifo(dev->serial, 0x06);
+#ifndef __APPLE__
             [[fallthrough]];
+#endif
         case PHASE_BAUD_RATE:
             sermouse_command_phase_idle(dev);
             sermouse_timer_on(dev, dev->report_period, 1);
@@ -645,7 +647,9 @@ ltsermouse_write(UNUSED(struct serial_s *serial), void *priv, uint8_t data)
                 switch (data) {
                     default:
                         mouse_serial_log("Serial mouse: Invalid period %02X, using 1200 bps\n", data);
+#ifndef __APPLE__
                         [[fallthrough]];
+#endif
                     case 0x6E:
                         dev->transmit_period = sermouse_transmit_period(dev, 1200, -1);
                         break;