Ok so I have gone through hell today haha. I have been trying to put OS X on my acer. I have done it succesfully both times, just not the upgrading part. I upgrade successfully to Kalyway 10.5.3 but when i try to upgrade to the Mac OS X 10.5.4 it freezes up at 14%, then I have to start all over again. It sucks! I follow this tutorial: [url="http://www.venera7.com/22-11-2008/installing-mac-os-x-kalyway-in-the-acer-aspire-one-aka-the-macbook-nano/"]http://www.venera7.com/22-11-2008/insta ... book-nano/[/url] Im fine all the way up to 10.5.4 update. When he tells me to put this in the terminal: $ sudo su - $ while sleep 1 ; do rm -rf /System/Library/Extensions/AppleIntelCPUPowerManagement.kext ; done But i may very well be typing it in wrong. Any ideas guys on what i should do when i get to that step.