Mac and external displays
mac and thunderbolt/mini displayPort to HDMI
My MBA has been hooked up to a 27” Samsung monitor at the office. After running into a sleep-wake issue I decided to switch connections to using HDMI to see if that resolved things.
I bought a minidisplayPort to HDMI cable from Apple and plugged it in. It came up … in 1080p. With no option to select the display’s native resolution (2560 x 1440)
Research…
- The MBA specs indicate that it is supported
- I have confirmed that the monitor supports displayPort v1.2 and HDMI v1.4.
- The CPU/graphics chip also supports it
- A review suggested that this native resolution worked on all 3 inputs
- Many questions https://superuser.com/questions/587124/having-trouble-getting-full-2560x1440-resolution-output-from-a-mac-book-pro
- https://www.apple.com/shop/question/answers/product/HFQL2VC/A/is-this-adapter-able-to-give-2560x1440-hdmi-output-from-a-13-macbook-air-2012-which-has-a-thunderbolt-1displayport-11a-output/QKFFX2XCUPU4T9KH7
- https://apple.stackexchange.com/questions/84140/can-a-macbook-air-support-2560x1600-output-via-hdmi-using-a-mini-displayport-thu
- https://forums.macrumors.com/threads/mac-mini-2560x1440-over-hdmi.1964447/
- https://forums.macrumors.com/threads/mac-mini-2560x1440.1962656/
- https://superuser.com/questions/119755/hdmi-with-resolution-2560-x-1440-possible
- https://discussions.apple.com/thread/4764055?start=0&tstart=0
- https://discussions.apple.com/thread/4492799?start=0&tstart=0
- http://www.mathewinkson.com/2013/03/force-rgb-mode-in-mac-os-x-to-fix-the-picture-quality-of-an-external-monitor