Color changed of Pixmap on QLabel on Mac

I use the setPixmap of QLabel to set a QPixmap in QLabel, which shows a picture.

The pixmap is transformd from a QImage and the QImage is from a cv::Mat.

On Mac platform, we find that the color of image on QLabel is more red than original image. 

I save the cv::Mat, QImage and QPixmap in the middle, but all of them is exactly the same with the origin.

I suspect this may be caused by pixmap scaled at first, but I try several scaled method but they did not help. I also remove the pixmap scale and resize the image in cv::Mat and it did not help.

The image in QLabel is more red, expecially on human face,  like cover a red filter on face on Mac. However, this never happend on Windows. So I am confused.

Our software is for designers, and they are sensitive with color. So I hope to get a solution as soon as possible.

I have attached several diff image, our code, and test app project below.

The images named with "our_app_diff_x.png" are the difference in our app, the images named with "test_app_diff_x.png" are the difference in the test app.

The test app is in the file QLabel_Color_changed.zip, I put these three test image in it.

Moreover, this bug happened in Qt 6.3.1 and 5.12.10.