diff --git a/src/apps/deskflow-gui/deskflow-gui.cpp b/src/apps/deskflow-gui/deskflow-gui.cpp
index 29662f186..79af05e38 100644
--- a/src/apps/deskflow-gui/deskflow-gui.cpp
+++ b/src/apps/deskflow-gui/deskflow-gui.cpp
@@ -32,7 +32,7 @@
 #include <QLoggingCategory>
 #endif
 
-#if !defined(Q_OS_MAC) && !defined(Q_OS_WIN)
+#if !defined(Q_OS_MACOS) && !defined(Q_OS_WIN)
 #include "platform/XDGPortalRegistry.h"
 #endif
 
@@ -51,7 +51,7 @@ int main(int argc, char *argv[])
   QLoggingCategory::setFilterRules(QStringLiteral("*.debug=true\nqt.*=false"));
 #endif
 
-#if !defined(Q_OS_MAC) && !defined(Q_OS_WIN)
+#if !defined(Q_OS_MACOS) && !defined(Q_OS_WIN)
   if (QT_VERSION < QT_VERSION_CHECK(6, 10, 0))
     deskflow::platform::setAppId();
 #endif
diff --git a/src/lib/deskflow/App.cpp b/src/lib/deskflow/App.cpp
index 1fba5a86d..334848ec7 100644
--- a/src/lib/deskflow/App.cpp
+++ b/src/lib/deskflow/App.cpp
@@ -22,7 +22,7 @@
 
 #include <stdexcept>
 
-#if defined(Q_OS_MAC)
+#if defined(Q_OS_MACOS)
 #include <ApplicationServices/ApplicationServices.h>
 #endif
 
diff --git a/src/lib/deskflow/ClientApp.cpp b/src/lib/deskflow/ClientApp.cpp
index 3f8d1c06c..abd49ee90 100644
--- a/src/lib/deskflow/ClientApp.cpp
+++ b/src/lib/deskflow/ClientApp.cpp
@@ -37,7 +37,7 @@
 #include "platform/EiScreen.h"
 #endif
 
-#if defined(Q_OS_MAC)
+#if defined(Q_OS_MACOS)
 #include "platform/OSXScreen.h"
 #endif
 
@@ -108,7 +108,7 @@ deskflow::Screen *ClientApp::createScreen()
       ),
       getEvents()
   );
-#elif defined(Q_OS_MAC)
+#elif defined(Q_OS_MACOS)
   return new deskflow::Screen(
       new OSXScreen(getEvents(), false, Settings::value(Settings::Client::LanguageSync).toBool()), getEvents()
   );
diff --git a/src/lib/deskflow/ServerApp.cpp b/src/lib/deskflow/ServerApp.cpp
index 5c89b1c48..8d8196312 100644
--- a/src/lib/deskflow/ServerApp.cpp
+++ b/src/lib/deskflow/ServerApp.cpp
@@ -43,7 +43,7 @@
 #include "platform/EiScreen.h"
 #endif
 
-#if defined(Q_OS_MAC)
+#if defined(Q_OS_MACOS)
 #include "platform/OSXScreen.h"
 #endif
 
@@ -393,7 +393,7 @@ deskflow::Screen *ServerApp::createScreen()
   return new deskflow::Screen(
       new MSWindowsScreen(true, Settings::value(Settings::Core::UseHooks).toBool(), getEvents()), getEvents()
   );
-#elif defined(Q_OS_MAC)
+#elif defined(Q_OS_MACOS)
   return new deskflow::Screen(new OSXScreen(getEvents(), true), getEvents());
 #else
   if (deskflow::platform::isWayland()) {
diff --git a/src/lib/deskflow/unix/AppUtilUnix.cpp b/src/lib/deskflow/unix/AppUtilUnix.cpp
index 15cd7ac50..bcd53b9ae 100644
--- a/src/lib/deskflow/unix/AppUtilUnix.cpp
+++ b/src/lib/deskflow/unix/AppUtilUnix.cpp
@@ -14,7 +14,7 @@
 #if WINAPI_XWINDOWS
 #include <X11/XKBlib.h>
 #include <deskflow/unix/XkbLayoutsParser.h>
-#elif defined(Q_OS_MAC)
+#elif defined(Q_OS_MACOS)
 #include <Carbon/Carbon.h>
 #include <platform/OSXAutoTypes.h>
 #endif
@@ -46,7 +46,7 @@ std::vector<std::string> AppUtilUnix::getKeyboardLayoutList()
 #if WINAPI_XWINDOWS
   layoutLangCodes = XkbLayoutsParser::getXkbLanguageList();
 
-#elif defined(Q_OS_MAC)
+#elif defined(Q_OS_MACOS)
   CFStringRef keys[] = {kTISPropertyInputSourceCategory};
   CFStringRef values[] = {kTISCategoryKeyboardInputSource};
   AutoCFDictionary dict(
@@ -142,7 +142,7 @@ std::string AppUtilUnix::getCurrentLanguageCode()
 
   result = XkbLayoutsParser::convertLayoutToISO(result);
 
-#elif defined(Q_OS_MAC)
+#elif defined(Q_OS_MACOS)
   AutoTISInputSourceRef source(nullptr, CFRelease);
   CFArrayRef layoutLanguages = nullptr;
   {
diff --git a/src/lib/gui/StyleUtils.h b/src/lib/gui/StyleUtils.h
index 6cc335f45..b9d7c3bb6 100644
--- a/src/lib/gui/StyleUtils.h
+++ b/src/lib/gui/StyleUtils.h
@@ -60,7 +60,7 @@ inline QFont fixedFont()
   QFont f = QFontDatabase::systemFont(QFontDatabase::FixedFont);
 #endif
 
-#if defined(Q_OS_MAC)
+#if defined(Q_OS_MACOS)
   f.setPointSize(12);
 #endif
   return f;