--- src/hid_osx.c.orig
+++ src/hid_osx.c
@@ -347,6 +347,7 @@
 	CFRunLoopStop(CFRunLoopGetCurrent());
 }
 
+#if MAC_OS_X_VERSION_MIN_REQUIRED > 1060
 static int
 set_nonblock(int fd)
 {
@@ -394,6 +395,7 @@
 	return (IOServiceGetMatchingService(kIOMainPortDefault,
 	    IORegistryEntryIDMatching(id)));
 }
+#endif
 
 void *
 fido_hid_open(const char *path)
@@ -417,6 +419,7 @@
 		goto fail;
 	}
 
+#if MAC_OS_X_VERSION_MIN_REQUIRED > 1060
 	if (set_nonblock(ctx->report_pipe[0]) < 0 ||
 	    set_nonblock(ctx->report_pipe[1]) < 0) {
 		fido_log_debug("%s: set_nonblock", __func__);
@@ -432,6 +435,12 @@
 		fido_log_debug("%s: get_ioreg_entry: %s", __func__, path);
 		goto fail;
 	}
+#else
+	if ((entry = IORegistryEntryFromPath(kIOMainPortDefault,path)) == MACH_PORT_NULL) {
+		fido_log_debug("%s: IORegistryEntryFromPath: %s", __func__, path);
+		goto fail;
+	}
+#endif
 
 	if ((ctx->ref = IOHIDDeviceCreate(kCFAllocatorDefault,
 	    entry)) == NULL) {