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Hi, I plugged in HDMI on MB Pro mid 2012, via TB adaptor. Immediately laptop screen went to 1920x1080… why won’t it let me change resolution to higher when thunderbolt not plugged in? I don’t understand - if it can do higher resolution, why is it not allowed in desktop settings?
https://postimg.org/image/7fn9muzkf/ Attached the OS Sierra desktop on laptop is at 1920x1080… Thanks!
Here’s the specs for your system: MacBook Pro 13" 2.9 GHz i7 (Mid-2012) Here’s what the system is able to support from EveryMac: 1280x800 Apple reports that this system also supports: 1152 by 7201024 by 640800 by 500 pixels at 16:10 aspect ratio; 1024 by 768, 800 by 600, and 640 by 480 pixels at 4:3 aspect ratio1024 by 768, 800 by 600, and 640 by 480 pixels at 4:3 aspect ratio stretched720 by 480 pixels at 3:2 aspect ratio720 by 480 pixels at 3:2 aspect ratio stretched Now here’s the other shoe falling… Intel HD Graphics 4000 services can’t push two screens at different scaling or ratio’s Now the newer retina class systems offer deeper options MacBook Pro 13" 3.1 GHz i7 (Early 2015) for reference: 3840x2160 on two external displays via Thunderbolt 2, Alternately, it can support a single display up to 3840x2160 via Thunderbolt 2 and a single 1080p display at up to 60 Hz, 3840x2160 at 30 Hz, or 4096x2160 at 24 Hz via HDMI. This series uses the newer Intel Iris 6100 graphics services. Even still the internal display is not running in true higher screen resolution depending on your OS version. Here’s a bit more on that: 4 Ways to Run a Retina MacBook Pro at 2880×1800 Native Resolution.
