Fix: macOS use quality profile FPS/bitrate, add HW resolution downscaling

linux/ScreenHandler.h

@@ -926,6 +926,7 @@ public:
             const QualityProfile& profile = GetQualityProfile(m_qualityLevel);
             m_maxFPS.store(profile.maxFPS);
             m_bAlgorithm.store(GetEffectiveAlgorithm(profile.algorithm));
+            m_h264Bitrate = profile.bitRate;
         }
     }