diff --git a/src/TrayIcon.cpp b/src/TrayIcon.cpp
index 8eaf522e..3b74544c 100644
--- a/src/TrayIcon.cpp
+++ b/src/TrayIcon.cpp
@@ -98,7 +98,7 @@ MsgCountComposedIcon::pixmap(const QSize &size, QIcon::Mode mode, QIcon::State s
 TrayIcon::TrayIcon(const QString &filename, QWindow *parent)
   : QSystemTrayIcon(parent)
 {
-#if defined(Q_OS_MAC) || defined(Q_OS_WIN)
+#if defined(Q_OS_MACOS) || defined(Q_OS_WIN)
     setIcon(QIcon(filename));
 #else
     icon_ = new MsgCountComposedIcon(filename);
diff --git a/src/UserSettingsPage.h b/src/UserSettingsPage.h
index bc7c31ac..44cf7c84 100644
--- a/src/UserSettingsPage.h
+++ b/src/UserSettingsPage.h
@@ -465,7 +465,7 @@ class UserSettingsModel : public QAbstractListModel
         Theme,
         MobileMode,
         DisableSwipe,
-#ifndef Q_OS_MAC
+#ifndef Q_OS_MACOS
         ScaleFactor,
 #endif
         Font,
@@ -551,7 +551,7 @@ class UserSettingsModel : public QAbstractListModel
         COUNT,
         // hidden for now
         AccessToken,
-#ifdef Q_OS_MAC
+#ifdef Q_OS_MACOS
         ScaleFactor,
 #endif
 #ifndef NHEKO_DBUS_SYS
diff --git a/src/main.cpp b/src/main.cpp
index ab030ea4..f3a195b9 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -21,7 +21,7 @@
 
 // in theory we can enable this everywhere, but the header is missing on some of our CI systems and
 // it is too much effort to install.
-#if defined(Q_OS_UNIX) && !defined(Q_OS_MAC)
+#if defined(Q_OS_UNIX) && !defined(Q_OS_MACOS)
 #include <QtGui/qpa/qplatformwindow_p.h>
 #endif
 
@@ -35,7 +35,7 @@
 #include "Utils.h"
 #include "config/nheko.h"
 
-#if defined(Q_OS_MAC)
+#if defined(Q_OS_MACOS)
 #include "emoji/MacHelper.h"
 #include "notifications/Manager.h"
 #endif
@@ -114,7 +114,7 @@ registerSignalHandlers()
 
 #endif
 
-#if defined(GSTREAMER_AVAILABLE) && (defined(Q_OS_MAC) || defined(Q_OS_WINDOWS))
+#if defined(GSTREAMER_AVAILABLE) && (defined(Q_OS_MACOS) || defined(Q_OS_WINDOWS))
 GMainLoop *gloop = 0;
 GThread *gthread = 0;
 
@@ -168,7 +168,7 @@ main(int argc, char *argv[])
 
     // this needs to be after setting the application name. Or how would we find our settings
     // file then?
-#if defined(Q_OS_UNIX) && !defined(Q_OS_MAC)
+#if defined(Q_OS_UNIX) && !defined(Q_OS_MACOS)
     if (qgetenv("QT_SCALE_FACTOR").size() == 0) {
         float factor = utils::scaleFactor();
 
@@ -254,7 +254,7 @@ main(int argc, char *argv[])
     if (!singleapp.isPrimaryInstance()) {
         auto token = qgetenv("XDG_ACTIVATION_TOKEN");
 
-#if defined(Q_OS_UNIX) && !defined(Q_OS_MAC)
+#if defined(Q_OS_UNIX) && !defined(Q_OS_MACOS)
         // getting a valid activation token on wayland is a bit of a pain, it works most reliably
         // when you have an actual window, that has the focus...
         auto waylandApp = app.nativeInterface<QNativeInterface::QWaylandApplication>();
@@ -304,7 +304,7 @@ main(int argc, char *argv[])
         return 0;
     }
 
-#if !defined(Q_OS_MAC)
+#if !defined(Q_OS_MACOS)
     app.setWindowIcon(QIcon::fromTheme(QStringLiteral("nheko"), QIcon{":/logos/nheko.png"}));
 #endif
 #ifdef NHEKO_FLATPAK
@@ -320,7 +320,7 @@ main(int argc, char *argv[])
 
     registerSignalHandlers();
 
-#if defined(GSTREAMER_AVAILABLE) && (defined(Q_OS_MAC) || defined(Q_OS_WINDOWS))
+#if defined(GSTREAMER_AVAILABLE) && (defined(Q_OS_MACOS) || defined(Q_OS_WINDOWS))
     // If the version of Qt we're running in does not use GLib, we need to
     // start a GMainLoop so that gstreamer can dispatch events.
     const QMetaObject *mo = QAbstractEventDispatcher::instance(qApp->thread())->metaObject();
@@ -469,7 +469,7 @@ main(int argc, char *argv[])
     QDesktopServices::setUrlHandler(
       QStringLiteral("matrix"), ChatPage::instance(), "handleMatrixUri");
 
-#if defined(Q_OS_MAC)
+#if defined(Q_OS_MACOS)
     // Temporary solution for the emoji picker until
     // nheko has a proper menu bar with more functionality.
     MacHelper::initializeMenus();