diff --git a/YACReaderLibrary/library_comic_opener.cpp b/YACReaderLibrary/library_comic_opener.cpp
index 18ac16b5..0a4d3a02 100644
--- a/YACReaderLibrary/library_comic_opener.cpp
+++ b/YACReaderLibrary/library_comic_opener.cpp
@@ -18,7 +18,7 @@ bool YACReader::openComic(const ComicDB &comic,
         labelParam = QString("--readingListId=%1").arg(source.sourceId);
     }
 
-#ifdef Q_OS_MACOSOS
+#ifdef Q_OS_MACOS
     QStringList possiblePaths { QDir::cleanPath(QCoreApplication::applicationDirPath() + "/../../../") };
     possiblePaths += QStandardPaths::standardLocations(QStandardPaths::ApplicationsLocation);
 
diff --git a/YACReaderLibrary/main.cpp b/YACReaderLibrary/main.cpp
index a1ddcae0..afedc607 100644
--- a/YACReaderLibrary/main.cpp
+++ b/YACReaderLibrary/main.cpp
@@ -21,7 +21,7 @@
 #include "yacreader_libraries.h"
 #include "exit_check.h"
 #include "opengl_checker.h"
-#ifdef Q_OS_MACOSOS
+#ifdef Q_OS_MACOS
 #include "trayhandler.h"
 #endif
 
@@ -268,7 +268,7 @@ int main(int argc, char **argv)
     if (!settings->value(START_TO_TRAY, false).toBool() || !settings->value(CLOSE_TO_TRAY, false).toBool()) {
         mw->show();
     }
-#ifdef Q_OS_MACOSOS
+#ifdef Q_OS_MACOS
     else {
         OSXHideDockIcon();
     }
diff --git a/YACReaderLibrary/trayicon_controller.cpp b/YACReaderLibrary/trayicon_controller.cpp
index ad35d9dd..efb17490 100644
--- a/YACReaderLibrary/trayicon_controller.cpp
+++ b/YACReaderLibrary/trayicon_controller.cpp
@@ -7,7 +7,7 @@
 #include <QtWidgets>
 #include <QMessageBox>
 
-#ifdef Q_OS_MACOSOS
+#ifdef Q_OS_MACOS
 #include "trayhandler.h"
 #endif
 
@@ -26,7 +26,7 @@ TrayIconController::TrayIconController(QSettings *settings, LibraryWindow *windo
 #ifdef Q_OS_WIN
         trayIcon.setIcon(QIcon(":/icon.ico"));
 #else
-#ifdef Q_OS_MACOSOS
+#ifdef Q_OS_MACOS
         auto icon = QIcon(":/macostrayicon.svg");
         icon.setIsMask(true);
         trayIcon.setIcon(icon);
@@ -69,7 +69,7 @@ void TrayIconController::updateIconVisibility()
 
 bool TrayIconController::handleCloseToTrayIcon(QCloseEvent *event)
 {
-#ifdef Q_OS_OSX
+#ifdef Q_OS_MACOS
     if (!event->spontaneous() || !window->isVisible()) {
         return false;
     }
@@ -83,7 +83,7 @@ bool TrayIconController::handleCloseToTrayIcon(QCloseEvent *event)
                                         "of the system tray icon."));
             settings->setValue(CLOSE_TO_TRAY_NOTIFIED, true);
         }
-#ifdef Q_OS_OSX
+#ifdef Q_OS_MACOS
         OSXHideDockIcon();
 #endif
         window->hide();
@@ -96,7 +96,7 @@ bool TrayIconController::handleCloseToTrayIcon(QCloseEvent *event)
 
 void TrayIconController::showWindow()
 {
-#ifdef Q_OS_MACOSOS
+#ifdef Q_OS_MACOS
     OSXShowDockIcon();
     window->showNormal();
 #else