Hey all, I have my lovely trusty MacBook Pro (Late 2013) with a new issue. I was installing operating systems on an external drive so that I can work around some app incompatibilities. I first tried out Mavericks, and I hadn't yet installed any other apps, but while playing around trying to get a wave of nostalgia, I opened Photo Booth. "No camera connected". Same thing with FaceTime and System Information. I tried rebooting, PRAM and SMC resets, but still nothing. I also tried El Capitan and High Sierra but got the same result. I rebooted back to my normal system, and I found the same issue there too. Any ideas? Thanks!!