Has anybody succesfully installed the 10.5.5. update? I have tried the 'Mysticus' method using the pre and post pacthers ([url="http://forum.insanelymac.com/index.php?showtopic=109102&hl="]http://forum.insanelymac.com/index.php? ... 109102&hl=[/url]) but this resulted in that I could only boot in safe mode. The other method described on Insamelymac; do rm -rf /System/Library/Extensions/AppleIntelCPUPowerManagement.kext; done + the additional DSMOS steps did not work for me as just after the apple update the OS wanted to restart, so no possibility to do:nano /System/InstallAtStartup/scripts/1 If someone has a good/proven different method for upgrading to upgrade to 10.5.5 please post your steps here. Ciao, Frans