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Cazart1 Author

Level 1

23 points

Underscan slider missing in Display set-up window

Underscan slider missing in Display setup window. Screen does not fill the external monitor display and their are black borders around the screen. Using a MacBook 12 (early 2015) w/MacOS Sierra 10.12.5 and a HP Pavilion 32 Monitor at 1440P resolution.

I am connecting the HP monitor to the MacBook 12 via the USB-TypeC port adapter and an HDMI cable supplied by the Monitor (I have tried different HDMI cables and still have same issue - Underscan slider is missing and the screen does not fill the monitor). The MacBook 12 does seem to correctly recognize the HP display and automatically goes to the correct resolution (1440P), however, there are Black borders (approx 1") around all 4 sides of the screen.

If I turn overscaning on the HP monitor's internal set-up, then the screen image goes beyond the monitor's edge and the menu bars are not visible because they over the edge of the display. And I still don't see the Underscan slider in the Display set-up that would adjust and correct the image size to match the display size.

When I connect the same HP monitor to an older MacBook Air using the same HDMI cable but a Mini-Displayport to HDMI adapter, then every thing works. The MacBook Air recognizes the HP monitor and the Underscan slider is available to adjust the screen image so that it fills the display perfectly.

I have tried mirroring and not-mirroring and still the MacBook 12 Underscan slider is missing in Display set-up window.

Any help will be appreciated.

MacBook (Retina, 12-inch, Early 2015), macOS Sierra (10.12.5), HP Pavilion 32 external monitor

Posted on May 27, 2017 11:47 AM

Top-ranking reply

rmeister0

Level 1

9 points

Posted on Aug 14, 2017 1:09 PM

Yes, we do need to use under scan. I have an HP 2310 monitor. It interprets HDMI inputs as a television signal and applies overscan to the image, causing the outer edge of the display to be cut off. On MacOS, it means the dock and the menu bar are out of frame and you cannot see them.

This is why the under scan adjustment was crucial, and no amount of fiddling with the other options on the MacBook resolve the issue, and the monitor itself has no option to turn off the overscan setting.

So the option is to use my $2800 MacBook in a non-native setting to the display, or scale down to a lower display and have an enlarged black order all around the display. Neither option should be acceptable for the cost of this machine, especially considering the adjust was available before.

View in context

21 replies

Mar 27, 2018 2:20 AM in response to sawatzky

/I replied below but in my display options soon my monitor it is HDMI 1 ( VGA or PC) and HDMI 2 (VGA or PC) So I guess my monitor supports both just have to select the right one, but no overscan, Why Apple did you remove this feature ♂

Apr 9, 2018 5:30 PM in response to Cazart1

It would be amazing that somebody from Apple answer to this post. Its a problem without a certainly solution all over internet.

Lots of computers practically losses their second display advantages after the underscan slider remotion!

I'm having the same issues with a Mac Mini, a Retina -2015- MBP, and the new Macbook.

Aug 1, 2017 4:51 AM in response to Cazart1

I am having the same problem! The underscan has disappeared and know I can't correct my HP display for my Mac Mini.

NomoHawk

Level 1

4 points

Sep 5, 2017 11:29 AM in response to KKoczian

Unfortunately, my TV do not show any such option, I have tried many different menus but no luck..my only option is to get it fixed from my macOS itself

Oct 16, 2017 6:32 PM in response to KKoczian

This solved my problem with a MacBook 2016 and HP 27vc monitor. I had been trying to fix this for weeks. Thanks so much!

Mar 24, 2018 2:17 AM in response to Mainyehc

Thank you very much !

I was searching for this particular answer to solve my overscan issue with a low-end tv on Sierra.

Found out 9500 is perfect for me.

Underscan slider missing in Display set-up window