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Not all adapters support your monitor's native resolution and refresh rate, so if you were to go this route, best to carefully check the adapter's maximum supported display mode. USB-A display adapters typically rely on a tech known as DisplayLink, which is what enables USB to output a video signal. With the second proposal, it will work but is not ideal. While the Thunderbolt 2 port in the MacBook Air natively supports mini DP output, as soon as you connect it to Apple's Thunderbolt 3 (USB-C) to Thunderbolt 2 adapter, the signal coming out of the other end is purely Thunderbolt. It expects a DisplayPort alt-mode signal from its USB-C port, so proposal #1 definitely won't work. The LG 27UK850-W is not a Thunderbolt monitor. I believe the fact that the Mac's mini DisplayPort can also do Thunderbolt 2 is not really relevant in this case. I assume then you would probably what a mini DisplayPort to 4K HDMI adapter (or cable) and monitor with HDMI input and at least 4K resolution. ◦ HDMI audio and video output using third-party Mini DisplayPort to HDMI Adapter (sold separately)Īccording to, "4K Ultra HD refers to 3840 x 2160 pixels". ◦ Dual-link DVI output using Mini DisplayPort to Dual-Link DVI Adapter (sold separately) ◦ VGA output using Mini DisplayPort to VGA Adapter (sold separately) ◦ DVI output using Mini DisplayPort to DVI Adapter (sold separately) *Although Apple originally only reported that this model could support a single external display up to 2560x1600, third-parties discovered that it actually could support a 3840x2160 (4K) display, and Apple subsequently revised their official documentation to confirm this, as well.Īpples Technical Specifications states for MacBook Air (13-inch, Early 2015):ĭual display and video mirroring: Simultaneously supports full native resolution on the built-in display and up to 3840 by 2160 pixels on an external display, both at millions of colors.
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