I've just made a fresh 10.6.7 install on my MacBook Pro 2 GHz Intel Core Duo. I loaded it from a 10.6 Install Disk and then did the 10.6.7 combo update. Unfortunately ShhMBP no longer works, so I now have to put up with the terrible processor whine that ShhMBP was designed (very cleverly) to stop. After startup and login I know receive the message: Insecure Startup Item disabled. "/Library/StartupItems/ShhMBP" has not been started because it does not have the proper security settings. I tried changing the attributes using BatChmod, to system -r -w -x wheel -r -w -x, and then did the same in Terminal using "sudo chown -R root:wheel /Library/StartupItems/ShhMBP/". I then tried removing a possible quarantine attribute using "sudo xattr -r -d com.apple.quarantine /Library/StartupItems/ShhMBP". I doubt that was the issue anyway. I'm a bit puzzled and more than a little ticked off about this. Any help from anyone would be hugely appreciated. Thanks in advance, Mark. P.S: I've followed the advice through the thread at http://forums.macrumors.com/showthread.php?t=779410 but to no avail. This appears to me to be a new problem with 10.6.7, yeah?