I didn't touch anything else (memory usage is already set, and I didn't click 'Advanced.').Ħ.

I have my resolution set to 'Best for Retina Display'. Then in the list below, click on 'Graphics'. Click on the 3rd 'tab' called 'Hardware' at the top. You won't be able to change this, if your VM is running and Windows 10 is running!Ĥ. Right underneath that, it says 'Scale to fit screen:'. The ONLY thing I have checked here is one checkbox 'Allow Windows 10 to set display gamma'. Then in the list below, click on 'Full Screen'. Click on the 2nd 'tab' called 'Options' at the top. The popup window will say 'Windows 10 - Options' at the top.Ĥ. After Parallels Tools is installed, and with the Windows 10 VM still off, click those double red bars again, then choose 'Configure'.ģ. The let the Install/Reinstall run, unattended.Ģ. Basically, don't ignore that msg or nothing may happen. You have to click it, and a popup appears again, and then click 'Install Parallels Tools', or something. It's a Windows 10 msg of some kind that says 'click here to tell it what you want to do'. You have to click on that again, to really get it started. The first time I did this, a Windows 10 msg popped up in the bottom right. If you have never installed them, it will just say 'Install Parallels Tools'. You do this from the double red bar icon in upper right, click Actions, Then 'Reinstall Parallels Tools'. Reinstall Parallels Tools (I shut down the Windows 10 VM (virtual machine) first). That's my suggestion: some options are NOT there if you have an external monitor plugged in.ġ. One poster above gave me the clue in #1 below: thank you! Let me share what I did (this is simply what worked for me): Do all of this WITHOUT having your external monitor plugged into your MacBook. On my MacBook Pro 15', I also had the Windows 10 resolution 'locked' at 1024x768, which looked terrible. I signed up, just to post my solution here. Of course I shut windows properly down every time before making a new change in the Parallel settings.

In the Parallel Desktop Settings I changed at 'Options - Full Screen' all the options (also 'Scaled etc.') - no effect. I switched the DirectX v9 / v10 mode and the VSync option - both no effect.

I tried to start Windows 10 in 'window mode' or 'fullscreen mode' - no effect. In Windows 10 I cannot change the resolution. Only 1 Display is connected in general.Ĥ. (Besides, my display is a Dell U2711, connected via DisplayPort with 2560x1440 px / I already tried to connect another display via DVI - 1680x1050 px). I can't make any changes like 'Best for Retina Displays' - it's not there. Look at the Screenshots -> These are my options. I startet Windows 10 and shut it down properly via 'Parallel Desktop -> Shut down'.ģ. I startet Parallel Desktop 12 for Mac - Version 12.2.0 (41591) - it's still a trial version!Ģ. I want to give Windows 10 a higher resolution than 1024x768.ġ.

Can t change screen resolution