• Can I define custom resolutions bigger than 4096 pixels wide ?
    Yes, you can define custom resolutions bigger than 4096 pixels on OS X 10.9.5 and above if you use SwitchResX 4.5 or newer. OS X prior than 10.9.5 cannot manage such resolutions.
    (Note that scaled resolutions can be defined up to 32768 pixels in all OS X versions).