hey all, quick one. I have a 2011 MBP (13", upgraded ram and SSD/HDD) that since updating to El Capitain can not detect my USB webcam. Ive reset SMC to no avail. Tested camera on 2012 MBA Yosemite and works just fine. Is this a known issue with El Cap or does anyone know of a solution? Webcam is microsoft xbox live cam used for astrophotography auto guiding.