Defining it a second time will be useless: the Mac will refuse it again. Please note that defining 2560x1080 at 60Hz in SwitchResX is of no use: the Mac does already know that the monitor wants this resolution, but the Mac has refused to enable it. With SwitchResX, you can define new resolutions that fit inside the monitors and the Mac’s limits, but that are not natively claimed by the monitor. One of the limitations of most Macs before 2014 when using a DisplayPort output is a resolution bandwidth of 165 MHz. SwitchResX helps creating resolutions within the Mac's limits.
In this case, there's no other predefined resolution claimed by the monitor that fits inside the Mac's limits. If 2560x1080 at 60Hz doesn’t fit the Mac’s capabilities, then the Mac will only activate 1920x1080 at 60Hz.
Your Mac does or doesn’t activate each of these resolutions depending on its own capabilities.įor example, the monitor will send 1920x1080 at 60Hz as well as 2560x1080 at 60Hz as its wanted resolutions. The monitor communicate with the Mac and sends it a list of predefined resolutions it wants to get. Your Mac has limits in the resolutions it can send to the monitor and the monitor has limits in the resolutions it can show from the Mac. This question however doesn't refer to 5120x1440 monitors - for these monitors, please check the following FAQ. The description of the answer is written for 2560x1080, but the same applies for other resolutions This question is valid for getting wide screen resolutions on older Macs.įor example, 2560x1080, or 2560x1440, or 3840x1080, etc.
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