There are active DisplayPort to dual-link DVI adapters available, and these require the use of a dual-link cable:įor HDMI, there are both active and passive adapters available which support HDMI 1.3+, however one vendor adapter (Plugable) claims: Passive DisplayPort to dual-link DVI adapters do not exist due to DisplayPort's limited number of pins.
So if the DisplayPort input on the monitor isn't already occupied, the cheapest and/or least confusing solution might be to use a Mini DisplayPort to DisplayPort cable.
The MacBook Air (Early 2014, both the 11-inch and 13-inch models) supports up to 2560x1600 over DisplayPort. That monitor has a native resolution of 2560x1440, which requires either DisplayPort, dual-link DVI, or HDMI 1.3+ (the monitor might still work with single-link DVI or HDMI 1.2− if the MacBook is set to output a resolution of 1920x1200 or lower): The asker's own answer clarifies that a BenQ BL2420PT monitor was what wouldn't work with the passive adapters.
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