Using an external display alongside with Apple Retina

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Symptoms

I have a Mac computer with built-in Retina display and another external one (non-Retina). I want to work with my Windows virtual machine on both displays but I'm having resolution issues.

Cause

Very high resolution difference between the displays:

Resolution

A new option was introduced in Parallels Desktop 12 for Mac to work with the virtual machine on multiple displays with Retina: Best for external displays.

When this option is enabled, Windows manages resolution and DPI settings separately on every display. To enable this option"

  1. Open virtual machine configuration window > Hardware > Graphics.

  2. Set resolution setting to Best for external displays.

    NOTE: Windows will log off to apply the new settings (when running).

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