#SWITCHRESX RESOLUTION NOT INSTALLED MAC#
If the resolution is "active", and if selecting the resolution brings a message on the monitor like « out of range », that means that the Mac has accepted the resolution, but the monitor hasn't. This means the Mac doesn't accept the resolution. If the resolution is marked "not activated" or "invalid", you should try other parameters by lowering the frequency, for example. If selecting the resolution does work, you can try again with a slightly different frequency (51, 52Hz, etc) until you face a limit. This will for example allow to define 2560x1080 in 53Hz, which will remain under the 165 MHz limit (or 3840x1080 in 35Hz, or 2560x1440 in 40Hz)Īfter reboot, the resolution should be marked "active" and should be selectable in the SwitchResX menus. You can also try to create a custom resolution, checking SwitchResX "simplified settings" and selecting a formula like CVT-RB. Then save the settings and reboot when SwitchResX asks it. SwitchResX will help the Mac and the monitor into finding a resolution that matches their capabilities and is better than the only 1920x1080 resolution that you now have.įor this, you only have to define a custom resolution in SwitchResX with the parameters of the native resolution of the monitor (which you can get from the monitor’s EDID), and lower the frequency before saving the resolution (to 40Hz, for example). Most of the times, a good monitor can handle this lower frequency. However, you can define 2560x1080 at 53Hz for example, which is a resolution that fits in the standard limitation of 165 MHz for the bandwidth. 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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