diff --git a/src/corelib/codecs/qtextcodec_p.h b/src/corelib/codecs/qtextcodec_p.h
index 0fec1e80c7a9da3f643cfb9e61c4d0369592b4a2..00c067821e96b7127ea90918fddadaa0321ef6da 100644
--- a/src/corelib/codecs/qtextcodec_p.h
+++ b/src/corelib/codecs/qtextcodec_p.h
@@ -60,7 +60,7 @@ QT_BEGIN_NAMESPACE
 
 #ifndef QT_NO_TEXTCODEC
 
-#if defined(Q_OS_MAC) || defined(Q_OS_IOS) || defined(Q_OS_ANDROID) || defined(Q_OS_QNX)
+#if defined(Q_OS_MAC) || defined(Q_OS_ANDROID) || defined(Q_OS_QNX)
 #define QT_LOCALE_IS_UTF8
 #endif
 
diff --git a/src/corelib/global/qglobal.cpp b/src/corelib/global/qglobal.cpp
index e6da7bb32d38ddb408fec32f25f3fb67a9d6629f..eb0455c31e42b2949f8cc548ee9b6232a3a07901 100644
--- a/src/corelib/global/qglobal.cpp
+++ b/src/corelib/global/qglobal.cpp
@@ -1694,7 +1694,7 @@ Q_CORE_EXPORT QString qt_mac_from_pascal_string(const Str255 pstr) {
 
 QSysInfo::MacVersion QSysInfo::macVersion()
 {
-#ifndef Q_OS_IOS
+#ifdef Q_OS_MACX
     SInt32 gestalt_version;
     if (Gestalt(gestaltSystemVersion, &gestalt_version) == noErr) {
         return QSysInfo::MacVersion(((gestalt_version & 0x00F0) >> 4) + 2);
diff --git a/src/corelib/kernel/qcore_mac_p.h b/src/corelib/kernel/qcore_mac_p.h
index 4211a23e0fd2958fd8a778c976fa29331f812119..f0899c6dee52f8b08e4eaded6ee4022efc0e011c 100644
--- a/src/corelib/kernel/qcore_mac_p.h
+++ b/src/corelib/kernel/qcore_mac_p.h
@@ -65,7 +65,7 @@
 
 #include "qglobal.h"
 
-#ifndef Q_OS_IOS
+#ifdef Q_OS_MACX
 #include <CoreServices/CoreServices.h>
 #endif
 
diff --git a/src/corelib/thread/qthread_unix.cpp b/src/corelib/thread/qthread_unix.cpp
index be9b946990b9660fa77401f3df3f787cf3f9b0cd..6a911937855bcfa1350c40e65b576ea738e1097c 100644
--- a/src/corelib/thread/qthread_unix.cpp
+++ b/src/corelib/thread/qthread_unix.cpp
@@ -83,9 +83,9 @@
 #   define old_qDebug qDebug
 #   undef qDebug
 # endif
-#ifndef Q_OS_IOS
+#ifdef Q_OS_MACX
 # include <CoreServices/CoreServices.h>
-#endif //Q_OS_IOS
+#endif // Q_OS_MACX
 
 # ifdef old_qDebug
 #   undef qDebug
diff --git a/src/platformsupport/fontdatabases/mac/qcoretextfontdatabase.mm b/src/platformsupport/fontdatabases/mac/qcoretextfontdatabase.mm
index fbd836f7633ea877934bcadb3c66139c7d6a2e04..1e15a9e62c68275b8e66d868098aca6f72704ddc 100644
--- a/src/platformsupport/fontdatabases/mac/qcoretextfontdatabase.mm
+++ b/src/platformsupport/fontdatabases/mac/qcoretextfontdatabase.mm
@@ -41,7 +41,7 @@
 
 #include "qglobal.h"
 
-#ifndef Q_OS_IOS
+#ifdef Q_OS_MACX
 #import <Cocoa/Cocoa.h>
 #import <IOKit/graphics/IOGraphicsLib.h>
 #endif
@@ -107,7 +107,7 @@ static NSInteger languageMapSort(id obj1, id obj2, void *context)
 
 QCoreTextFontDatabase::QCoreTextFontDatabase()
 {
-#ifndef Q_OS_IOS
+#ifdef Q_OS_MACX
     QSettings appleSettings(QLatin1String("apple.com"));
     QVariant appleValue = appleSettings.value(QLatin1String("AppleAntiAliasingThreshold"));
     if (appleValue.isValid())
@@ -408,7 +408,7 @@ QStringList QCoreTextFontDatabase::fallbacksForFamily(const QString &family, QFo
 
     static bool didPopulateStyleFallbacks = false;
     if (!didPopulateStyleFallbacks) {
-#if !defined(Q_OS_IOS)
+#if defined(Q_OS_MACX)
         // Ensure we have the psNameToFamily mapping set up
         const_cast<QCoreTextFontDatabase*>(this)->populateFontDatabase();
 
@@ -457,7 +457,7 @@ QStringList QCoreTextFontDatabase::fallbacksForFamily(const QString &family, QFo
     return fallbackLists[styleLookupKey.arg(styleHint)];
 }
 
-#ifndef Q_OS_IOS
+#ifdef Q_OS_MACX
 QStringList QCoreTextFontDatabase::addApplicationFont(const QByteArray &fontData, const QString &fileName)
 {
 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_8
diff --git a/src/platformsupport/fontdatabases/mac/qcoretextfontdatabase_p.h b/src/platformsupport/fontdatabases/mac/qcoretextfontdatabase_p.h
index 5b9b8e23299b3384dd9d7ea833c6a7f8d0ed4270..8536ad91232fa4813f401f3f513acb7a5987593b 100644
--- a/src/platformsupport/fontdatabases/mac/qcoretextfontdatabase_p.h
+++ b/src/platformsupport/fontdatabases/mac/qcoretextfontdatabase_p.h
@@ -55,7 +55,7 @@ public:
     QFontEngine *fontEngine(const QFontDef &fontDef, QChar::Script script, void *handle);
     QFontEngine *fontEngine(const QByteArray &fontData, qreal pixelSize, QFont::HintingPreference hintingPreference);
     QStringList fallbacksForFamily(const QString &family, QFont::Style style, QFont::StyleHint styleHint, QChar::Script script) const;
-#ifndef Q_OS_IOS
+#ifdef Q_OS_MACX
     QStringList addApplicationFont(const QByteArray &fontData, const QString &fileName);
 #endif
     void releaseHandle(void *handle);
diff --git a/tests/auto/network/kernel/qnetworkproxyfactory/tst_qnetworkproxyfactory.cpp b/tests/auto/network/kernel/qnetworkproxyfactory/tst_qnetworkproxyfactory.cpp
index dd24f6757e48ca4b6f89bc280415eff88041e230..9e03884e4e7b570797fe04717b472b0b906d7ae1 100644
--- a/tests/auto/network/kernel/qnetworkproxyfactory/tst_qnetworkproxyfactory.cpp
+++ b/tests/auto/network/kernel/qnetworkproxyfactory/tst_qnetworkproxyfactory.cpp
@@ -380,7 +380,7 @@ void tst_QNetworkProxyFactory::genericSystemProxy()
     QFETCH(int, port);
 
 // The generic system proxy is only available on the following platforms
-#if (!defined Q_OS_BLACKBERRY) && (!defined Q_OS_WIN) && ((!defined Q_OS_MAC) || defined Q_OS_IOS)
+#if (!defined Q_OS_BLACKBERRY) && (!defined Q_OS_WIN) && (!defined Q_OS_MACX)
     qputenv(envVar, url);
     const QList<QNetworkProxy> systemProxy = QNetworkProxyFactory::systemProxyForQuery();
     QCOMPARE(systemProxy.size(), 1);