From a96f039fd48175a94518699d154644f717005e79 Mon Sep 17 00:00:00 2001
From: sixtysecrun <sixtysecrun@sixtysecrun.com>
Date: Mon, 23 Oct 2023 00:17:19 +0200
Subject: [PATCH] Use kIOMasterPortDefault if compiled with SDK<12

Compiling against Apple SDK older than 12.0 ends with errors:

error: use of undeclared identifier 'kIOMainPortDefault'

That is because `kIOMainPortDefault` was introduced in SDK 12.0
(Monterey) and before that the `kIOMasterPortDefault` should be used.

`kIOMasterPortDefault` was deprecated and was removed in SDK 12.0

References:
- https://developer.apple.com/documentation/iokit/kiomainportdefault
- https://developer.apple.com/documentation/iokit/kiomasterportdefault
---
 c_src/mac/keyio_mac.hpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/c_src/mac/keyio_mac.hpp b/c_src/mac/keyio_mac.hpp
index d2cc0a45..30883457 100644
--- a/c_src/mac/keyio_mac.hpp
+++ b/c_src/mac/keyio_mac.hpp
@@ -6,6 +6,12 @@
 #include <map>
 #include <iostream>
 #include <mach/mach_error.h>
+#include <AvailabilityMacros.h>
+
+/* The name was changed from "Master" to "Main" in Apple SDK 12.0 (Monterey) */
+#if !defined (MAC_OS_X_VERSION_12_0) || (MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_12_0)
+    #define kIOMainPortDefault kIOMasterPortDefault
+#endif
 
 int init_sink(void);
 int exit_sink(void);