Hi All. I have a 13" Late 2011 MPB running 10.8.3 12D68. Previously running 10.8.2 before I decided to try the beta's for 10.8.3 to see if it would fix this problem. I've currently got the Thunderbolt Firmware Update 1.0 Update stuck in my App Store Updates section, and it won't go, i've done the update with a full battery, plugged into the mains, and it won't go. When the progress bar starts on a restart it goes very quickly and then boots up again with the update still in the App Store. Has anyone got any definitive ideas on how to get it to clear or even install? Cheers.