(but before that your nvidia graphics driver should be installed and enabled this will work only if your system works with nvidia graphics driver) Now Run this. Select the orientation, resolution or scale, and refresh rate. If you have multiple displays and they are not mirrored, you can have different settings on each display. Open the Activities overview and start typing Displays.If the attached external display is a television, the resolution of the TV screen will be reported as 720p or 1080p too.
If you’re using multiple displays with the Mac, the resolution for each connected screen will be reported back.
