jpierre
[1] https://learn.sparkfun.com/tutorials/general-guide-to-sparkf...
Anecdotally, the RPi2 has been measured[2] around 4-6 watts under load and the Edison was measured[3] around 1 watt.
[1] http://devblogs.nvidia.com/parallelforall/nvidia-jetson-tx1-...
[2] https://github.com/geerlingguy/raspberry-pi-dramble/wiki/Pow...
[3] https://www.openice.info/2015/07/24/three-days-with-intel-ed...
[2] https://www.96boards.org/products/ce/dragonboard410c/
[3] https://developer.qualcomm.com/hardware/dragonboard-410c
Another OS X Kext for the (USB) Xbox One controller, if only for comparison: https://github.com/FranticRain/Xone-OSX
Quickly, you might take a look at the ODROID boards, they nicely cover the lower price and performance spectrum and do a nice job supporting them: http://www.hardkernel.com/main/main.php