First, very sorry for my English. I do not write often in English...

I just upgrade from an old iMac 2011 to the new iMac 4k 2017. I am quite pleased with it, but something's bothering me.

I have to work in remote desktop on another computer, a Dell Optiplex 3040, Windows 10, in another city. The resolution is not very good (probably because of my own 4K resolution). I tried a few tricks - downgrade my screen resolution with SwitchResX, but it just affect my own screen badly. I tried to adjust the resolution inside of the app (Remote Desktop by Microsoft), but no luck.

My question is : if i use an second monitor (not 4k), and display the screen of the MRD on it, could it address the situation ? Could the resolution on the external monitor would look like what I had on my old iMac ?

1 Answer 1


You can dedicate a secondary display to a remote desktop connection by setting Resolution to Native in the Edit window for a saved connection, and selecting Start session in full screen. You might also want to uncheck Use all monitors. If the resolution of the secondary display is suitable for your Windows 10 system, this is likely to work well. When full screen is selected, the session will open on the display containing the primary Microsoft Remote Desktop window.

You might be able to improve the appearance of a remote desktop on your primary display by using scaling (there is a Scaling item in the Window menu). The Scale content checkbox in the Edit allows you to change the default value for that. You might find that text is too small if you shrink the window too much, depending on how the Windows 10 system is configured.

  • Thank you for your answer. I tried that, but the scaling is not available in remote desktop (at least not in my session). I'll try something else (with the monitor) and see where it goes from there. Jun 27, 2017 at 0:59
  • Are you using the Microsoft Remote Desktop application from the App Store? Mine is version 8.0.39 (Build 27287). The behavior of that menu item is odd, in that it provides no real feedback (it doesn't show a check mark), but selecting it changes the way window resizing works. Also, the Window menu only has the Scaling item for a session window (not for the primary window). Jun 27, 2017 at 1:03
  • Hi Eirik, yes the one from the App Store. I use 8.0.40 built 27310. The scaling from the MRD works only in "non-full mode", giving the opportunity to scale a little bit the window, but doesn't give much improvement about resolution... Jun 27, 2017 at 1:54
  • Scaling does work in full screen mode, although it's a no-op if the resolution of the session matches the native resolution of the display containing the session. It can mismatch if you move the session to a display with a different resolution, or specify a non-native resolution in the saved session. You're likely to get the best results with a secondary display whose pixel density matches the Windows configuration. A Windows system whose text size is set larger than 100% is likely to look good on a Retina display (200% might be optimal for that). Jun 27, 2017 at 2:03

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