diff --git a/src/ProcessInfo.cpp b/src/ProcessInfo.cpp
index f3b48033..d38dac83 100644
--- a/src/ProcessInfo.cpp
+++ b/src/ProcessInfo.cpp
@@ -45,11 +45,11 @@
 #include <KUser>
 #include <QDebug>
 
-#if defined(Q_OS_FREEBSD) || defined(Q_OS_OPENBSD) || defined(Q_OS_MAC)
+#if defined(Q_OS_FREEBSD) || defined(Q_OS_OPENBSD) || defined(Q_OS_OSX)
 #include <sys/sysctl.h>
 #endif
 
-#if defined(Q_OS_MAC)
+#if defined(Q_OS_OSX)
 #include <libproc.h>
 #include <qplatformdefs.h>
 #endif
@@ -878,7 +878,7 @@ private:
     }
 };
 
-#elif defined(Q_OS_MAC)
+#elif defined(Q_OS_OSX)
 class MacProcessInfo : public UnixProcessInfo
 {
 public:
@@ -1184,7 +1184,7 @@ ProcessInfo* ProcessInfo::newInstance(int aPid, const QString& titleFormat, bool
     return new LinuxProcessInfo(aPid, titleFormat, enableEnvironmentRead);
 #elif defined(Q_OS_SOLARIS)
     return new SolarisProcessInfo(aPid, titleFormat, enableEnvironmentRead);
-#elif defined(Q_OS_MAC)
+#elif defined(Q_OS_OSX)
     return new MacProcessInfo(aPid, titleFormat, enableEnvironmentRead);
 #elif defined(Q_OS_FREEBSD)
     return new FreeBSDProcessInfo(aPid, titleFormat, enableEnvironmentRead);
diff --git a/src/Session.h b/src/Session.h
index 566e0f63..397b5156 100644
--- a/src/Session.h
+++ b/src/Session.h
@@ -56,7 +56,7 @@ class HistoryType;
  * Platform-specific main shortcut "opcode":
  */
 enum Modifier {
-#ifdef Q_OS_MAC
+#ifdef Q_OS_OSX
     ACCEL = Qt::META
 #else
     ACCEL = Qt::CTRL
diff --git a/src/TerminalDisplay.cpp b/src/TerminalDisplay.cpp
index ee79f7e2..8e43b7ee 100644
--- a/src/TerminalDisplay.cpp
+++ b/src/TerminalDisplay.cpp
@@ -726,7 +726,7 @@ void TerminalDisplay::drawBackground(QPainter& painter, const QRect& rect, const
     if (useOpacitySetting && !_wallpaper->isNull() &&
             _wallpaper->draw(painter, contentsRect, _opacity)) {
     } else if (qAlpha(_blendColor) < 0xff && useOpacitySetting) {
-#if defined(Q_OS_MAC)
+#if defined(Q_OS_OSX)
         // TODO - On MacOS, using CompositionMode doesn't work.  Altering the
         //        transparency in the color scheme alters the brightness.
         painter.fillRect(contentsRect, backgroundColor);
diff --git a/src/main.cpp b/src/main.cpp
index 1aa725c0..7dd80ead 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -81,7 +81,7 @@ extern "C" int Q_DECL_EXPORT kdemain(int argc, char* argv[])
     // enable high dpi support
     app->setAttribute(Qt::AA_UseHighDpiPixmaps, true);
 
-#if defined(Q_OS_MAC)
+#if defined(Q_OS_OSX)
     // this ensures that Ctrl and Meta are not swapped, so CTRL-C and friends
     // will work correctly in the terminal
     app->setAttribute(Qt::AA_MacDontSwapCtrlAndMeta);