On my 2011 imac 27 inch i5, I installed the OSX 10.6.8 update today. It used to be that my computer would start up in just 10 seconds. The startup time has now increased to over 20 seconds after this update. I know 20 seconds does not sound like much but compared to what it used to be, this is quite an increase. Is this normal? Have you guys experienced the same? Thanks!