This is complete rubbish. Apple software updates have been digitally signed since Tiger, OS X 10.4. It doesn't matter who sends you the bits, if the signature d

This is complete rubbish. Apple software updates have been digitally signed since Tiger, OS X 10.4. It doesn't matter who sends you the bits, if the signature doesn't validate, the software will not install. See http://support.apple.com/kb/HT5198 http://support.apple.com/kb/HT5198, for when the signing certificate was rolled. Also, Since OS X 10.4 Server, it was possible to run your own Software Update Server: http://www.apple.com/server/docs/Software_Update_Server_TB_v10.4.pdf http://www.apple.com/server/docs/Software_Update_Server_TB_v...