Hey All. I am fairly new to the Mac world and have come across a bizarre scenario. I tried using a Sandisk USB key on my MBP that worked fine on my Lenovo T60 and has worked in the past. When inserted in the MBP the screen had a grey "Sweep" from top of the screen down and the following WARNING appeared: Please excuse image quality it was taken with my iPhone. This happened again when I tried a Kinston stick that I have used on my MBP several times in the past. Both sticks work fine in my Pc Laptop and my iMac. On Friday i Installed: OUSBFamily-315.4.1.pkg and suspect this might be the culprit. Unfortunately I am so new to Apple that I am not sure if it might be something else or what to do if it is. Any help would be greatly appreciated.