Try to use UserNotifications.

CMakeLists.txt

@@ -46,9 +46,6 @@ find_package(Qt5 5.12 REQUIRED Widgets Network Quick Qml Gui Svg Multimedia)
 if(LINUX)
     find_package(Qt5DBus REQUIRED)
 endif(LINUX)
-if (APPLE)
-    find_package(Qt5MacExtras REQUIRED)
-endif(APPLE)
 # Qt5_Prefix is only used to show Qt path in message()
 # Qt5_BinDir is where all the binary tools for Qt are
 if (QT_QMAKE_EXECUTABLE)
@@ -212,9 +209,7 @@ target_link_libraries(${PROJECT_NAME}
 target_compile_definitions(${PROJECT_NAME} PRIVATE
     GIT_SHA1="${GIT_SHA1}" LIB_GIT_SHA1="${LIB_GIT_SHA1}")
 
-if (APPLE)
-    target_link_libraries(${PROJECT_NAME} Qt5::MacExtras)
-elseif(LINUX)
+if(LINUX)
     target_link_libraries(${PROJECT_NAME} Qt5::DBus)
 endif()
 

src/notifications/managermac.mm

@@ -1,13 +1,12 @@
 #include "manager.h"
 
-#include <Foundation/Foundation.h>
-#include <QtMac>
+#import <UserNotifications/UserNotifications.h>
 
-@interface NSUserNotification (CFIPrivate)
-- (void)set_identityImage:(NSImage*)image;
-@end
+#include <QApplication>
 
-NotificationsManager::NotificationsManager(QObject* parent) : QObject(parent) {}
+NotificationsManager::NotificationsManager(QObject* parent) : QObject(parent) {
+
+}
 
 void NotificationsManager::postNotification(const QString& roomId,
                                             const QString& eventId,
@@ -19,16 +18,37 @@ void NotificationsManager::postNotification(const QString& roomId,
   Q_UNUSED(eventId);
   Q_UNUSED(icon);
 
-  NSUserNotification* notif = [[NSUserNotification alloc] init];
+  UNUserNotificationCenter* center =
+      [UNUserNotificationCenter currentNotificationCenter];
+  UNAuthorizationOptions options = UNAuthorizationOptionAlert + UNAuthorizationOptionSound;
 
-  notif.title = roomName.toNSString();
-  notif.subtitle = QString("%1 sent a message").arg(senderName).toNSString();
-  notif.informativeText = text.toNSString();
-  notif.soundName = NSUserNotificationDefaultSoundName;
+  [center requestAuthorizationWithOptions:options
+   completionHandler:^(BOOL granted, NSError * _Nullable error) {
+    if (!granted) {
+      NSLog(@"Something went wrong");
+    }
+  }];
 
-  [[NSUserNotificationCenter defaultUserNotificationCenter]
-      deliverNotification:notif];
-  [notif autorelease];
+  UNTimeIntervalNotificationTrigger *trigger = [UNTimeIntervalNotificationTrigger triggerWithTimeInterval:300
+                                    repeats:NO];
+
+  UNMutableNotificationContent *content = [UNMutableNotificationContent new];
+
+  content.title = roomName.toNSString();
+  content.subtitle = QString("%1 sent a message").arg(senderName).toNSString();
+  content.body = text.toNSString();
+  content.sound = [UNNotificationSound defaultSound];
+
+  NSString *identifier = QApplication::applicationName().toNSString();
+
+  UNNotificationRequest *request = [UNNotificationRequest requestWithIdentifier:identifier
+                                    content:content trigger:trigger];
+
+  [center addNotificationRequest:request withCompletionHandler:^(NSError * _Nullable error) {
+      if (error != nil) {
+          NSLog(@"Something went wrong: %@",error);
+      }
+  }];
 }
 
 // unused