External monitor only up to 720 p using HDMI

I recently bought a Samsung curved (S27D590C; 1080 p). My setup is a MacBook Pro 13 "(mid-2012), connected to the screen using an adapter 3-in-1 (mini DisplayPort to VGA, DVI and HDMI). When I use the VGA, I can get up to 1080 p. For some reason, I can only 720 p when you use the HDMI cable.

The HDMI cable is probably good as I am able to get a 1080 p using a Windows laptop without adapters.

Additional information: by using the same configuration (MacBook + 3-in-1 adapter + HDMI cable), I am able to connect to another TV which has a native resolution of about 720 p.

Finally, connecting with the HDMI, my MacBook is able to detect the monitor but the monitor does is display a blank screen.

I would really appreciate everyones help, because this is my first purchase of external monitor. Thank you.

Hi Danne18,

Looks like you can't get good resolution on a monitor, and you get just nothing to display on another using your MacBook Pro. I would use the following article to help you get that resolved. There's a lot in there and some of it is basic, but it should lead you to getting this problem:

Get help with graphical problems on external displays connected to your Mac.

Thank you for using communities of Apple Support.

Tags: Notebooks

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