in relation to this question, I'm using the xrandr command in osx to perform operations on my external monitors. Unfortunately it does not appear to be recognising external montitors at all:
Cobrakai$xrandr --verbose --screen 1Invalid screen number 1 (display has 1)
Whereas it works fine for screen 0 (my native screen)
Cobrakai$xrandr --screen 0xrandr: Failed to get size of gamma for output defaultScreen 0: minimum 640 x 480, current 2304 x 1824, maximum 2304 x 1846default connected 2304x1824+0+0 0mm x 0mm 1280x800 60.0 2.0 1152x720 60.0 1024x768 60.0 1024x640 60.0 800x600 60.0 800x500 60.0 640x480 60.0 720x480 60.0 1280x778 1.0 1280x1824 1.0 1280x1846 2.0 2304x1824 1.0* 2304x1846 2.0 Cobrakai$
Even when other applications can tell that there are many screens (per screenshot) - how do I get xrandr to recognise the additional screens?