Hi all I have recently installed Skype on my MBA 13" 2013. The iSight camera didn't show up, so I searhced on google, and found a method to change the camera plugin, which I did. Skype worked, and everyone was happy. I installed 10.8.5 supplemental update, but then nothing on my Mac could find the iSight. Skype, Photo Booth and so on. I therefore changed the plugin to the old one, and photo booth worked again. Skype didn't, so i believe the plugin didn't receive the new update. Is it possible to install the update again, to see if it fixes the iSight problem, or do I have to reinstall the whole operating system? Thanks in advance.