Wondering if anyone knows how to change the way OS X boots? Specifically I want to run the bare minimum and nothing else. I assume there is a script somewhere that tells the OS what to load. I have looked in etc/rc but that just seems to handle the low-level stuff. I would also like to know what is essential to run the OS (ie kernal_task etc.) and what I can eliminate (i.e. cron, cups, etc..) Any ideas/links would be appreciated. thanks.