Missing Underscan Slider

[sfphoto]

Slider was there with Mavericks, not there with Sierra.
2012 Mini
Sony HDTV via HDMI

Both OSX versions recognize the Sony but both have OVERSCAN.
Mavericks allowed for correction.

Any one else come across this issue?

 

[joevt]

I don't see an Underscan slider in the Display Preferences panel in Monterey for my display, but I do see an Underscan slider in the SwitchResX menu.

Install SwitchResX, select "Display overscan/underscan" in the Menus options for the Menubar Extra (make sure the Menubar Extra is active).
Then for displays that support it, the SwitchResX menu will have an Underscan slider.

 

[sfphoto]

Thanks, the app does require disabling SIP though w/ 10.11 & 10.12 and presumably purchase.

 

[joevt]

Thanks, the app does require disabling SIP though w/ 10.11 & 10.12 and presumably purchase.

You can try the trial version without disabling SIP to see if the feature you want is available. Disabling SIP is required for the Contextual menu but shouldn't be required for the menubar menu.

 

[sfphoto]

Thanks, however I read that if one connects a DVI monitor and the OSX Display app has the underscan slider
THEN unplugs the monitor and connects the TV the slider option will still be present.
Restart though would most likely cause the OS to detect the TV so such action mentioned above would only be useful for occasional use which is my intention.

 

[fortuuna]

I have a similar problem. I was using 1 external monitor with my 2020 Mac Mini M1 on Monterey, and the image filled out my monitor normally. I setup a 2nd projector monitor and found the underscan slider to make it fit the screen, but now my original monitor is not taking up the whole screen and theres no underscan to make it larger. I hoped that ugrading to Ventura would fix it, but still the same problem. Any ideas on how to fix this?