New answers tagged hdmi
It's possible. You can run one monitor off the HDMI port and another 2 off of the Thunderbolt ports. You can get adapters for both of these. There's more out there than this but here's one Apple sells. http://www.apple.com/shop/product/MB570LL/B/mini-displayport-to-dvi-adapter BTW: Thunderbolt ports can work Mini Display port adapters.
Do NOT use the HDMI video output! Please buy a Mini DisplayPort cable connect your MacBook and U2715H.
Your MacBook Pro HDMI port is output only. So no, you can not use it as input for your recording. Your alternatives are USB 3 or Thunderbolt.
It sounds like you have the external display set as the primary display. Take a look at this article on how to set your primary display. Set the Primary Display on a Mac
You won't know until you actually get it and test it. HDMI specs say you should get 5v at 50mA. That's not much to start with. You can read about this more from here. You could get more power but it would have to have MHL (mobile high definition link) support. That will be able to give you up to 40 watts. Now, I looked on the Apple site and it ...
Adapters can be finicky things. I have had mixed results even with genuine Apple display adapters. You would think something this simple would be a no-brainier; just buy, plug in and go to work. It may be the adapter itself that is giving you problems so you will want to return it and get another. However, as has been previously stated, you should be ...
First off: In principal your approach should work. Unfortunately it clearly doesn't for you. As suggest by Vzzdak. You can try a Mini DisplayPort-to-DVI adapter
Looking at the specs for the Dell E2414H monitor, it has a DVI (digital) connector. What you need is a Mini DisplayPort-to-DVI adapter. Unfortunately, it appears that Apple no longer sells such an adapter (they used to have it last summer). Looking at Newegg, here is an example of the adapter that you need.
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