Black Screen after updating to OS X Mavericks 10.9.2

Problem A few Apple mac’s have been booting to a black screen with the mouse curser and nothing else after updating to Mavericks(10.9.2),. Cause It seems to be a problem with a Security update, which isn’t completing the installation procedure and causing the system to hang. Solution A reinstall of OS X won’t work, the same as resetting the… Continue reading Black Screen after updating to OS X Mavericks 10.9.2