Version 1.4.0: Fix build for old OS X versions.

Telegram/SourceFiles/base/bytes.h

@@ -7,6 +7,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 */
 #pragma once
 
+#include "base/basic_types.h"
 #include <gsl/gsl>
 #include <gsl/gsl_byte>
 

Telegram/SourceFiles/export/export_pch.h

@@ -17,6 +17,10 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include <QtCore/QReadWriteLock>
 #include <QtCore/QRegularExpression>
 
+#if QT_VERSION < QT_VERSION_CHECK(5, 5, 0)
+#define OS_MAC_OLD
+#endif // QT_VERSION < 5.5.0
+
 #include <crl/crl.h>
 #include <rpl/rpl.h>
 

Telegram/SourceFiles/platform/mac/specific_mac_p.mm

@@ -121,7 +121,11 @@ ApplicationDelegate *_sharedDelegate = nil;
 	});
 #ifndef OS_MAC_STORE
 	if ([SPMediaKeyTap usesGlobalMediaKeyTap]) {
+#ifndef OS_MAC_OLD
 		if (QSysInfo::macVersion() < Q_MV_OSX(10, 14)) {
+#else // OS_MAC_OLD
+		if (true) {
+#endif // OS_MAC_OLD
 			_keyTap = [[SPMediaKeyTap alloc] initWithDelegate:self];
 		} else {
 			// In macOS Mojave it requires accessibility features.