Can't use HDMI to VGA adapter with Macbook Pro 2015.

Question

Level 1

7 points

Can't use HDMI to VGA adapter with Macbook Pro 2015.

Hi, I am trying to use an external monitor with my Macbook Pro 2015 but it seems like there is a problem. When I plug in the adapter my computer's screen goes black and comes back again and again. I have tried using the adapter with a computer runs Windows and everything worked properly. Is there a anything like "We can only use adapters compatible with Macs" ? What should I do about that ?

I have recorded a video showing the poblem I am having. Access it from here.

MacBook Pro with Retina display, macOS High Sierra (10.13.3), null

Posted on Mar 31, 2018 3:52 AM

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Answer 1

brenden dv

Community Specialist

Apr 2, 2018 2:37 PM in response to SametSahin

Hi, SametSahin!

Thanks for stopping by the Apple Support Communities. If I understand your post, when using an external display with macOS on your MacBook Pro, the internal display flips from the display to black and back again consistently. I'm happy to help!

Based on what you've described, I would first suggest reviewing the video support for external monitors, which can be found below from MacBook Pro (Retina, 13-inch, Early 2015) - Technical Specifications :

Graphics and Video Support

Intel Iris Graphics 6100

Dual display and video mirroring: Simultaneously supports full native resolution on the built-in display and up to 3840 by 2160 pixels on up to two external displays, both at millions of colors.

Thunderbolt digital video output

Native Mini DisplayPort output

DVI, VGA, dual-link DVI, and HDMI output supported using Mini DisplayPort adapters (sold separately)

HDMI video output

Support for 1080p resolution at up to 60Hz

Support for 3840-by-2160 resolution at 30Hz

Support for 4096-by-2160 resolution at 24Hz

Once you've confirmed your setup is supported, follow the steps here to make sure you've got everything set up correctly: Use multiple displays with your Mac - Apple Support . If you do and still have trouble, check out Get help with video issues on external displays connected to your Mac - Apple Support for help troubleshooting.

Have a great day!

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Answer 2

Lanny

Level 6

13,225 points

Apr 2, 2018 2:44 PM in response to SametSahin

Your video doesn't work. It would help if you identified the make and model of your monitor. What kind of input connections does it have. Is it so old that all you can use is an ancient analog VGA connection?

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Answer 3

May 23, 2018 5:39 AM in response to SametSahin

What is the make and model of the adapter?

I have a number of these that have been installed in offices and lecture theatres and they work well: http://www.belkin.com/uk/p/P-AV10170/

the adaptor must be an active adaptor, meaning there is an electronic chip inside to perform the signal conversion.

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Can't use HDMI to VGA adapter with Macbook Pro 2015.

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