Hi, I know this must have been asked before, probably multiple times, but I can't seem to find a satisfactory answer. I know that there are three CRON tasks (daily, weekly, monthy) that should run automatically, but probably don't (on a laptop, at least). I know there are about a million tools out there to force them to run, and that they can be run manually in the terminal (sudo periodic daily weekly monthly). At present I am probably worry about this way too much -- I run the terminal command pretty much every time I power-up my machine (followed by repairing permissions, which is a whole other question...). So, my question is: is this necessary. And more pertinently (as I've just ordered a new machine) will these commands run automatically on an iMac meaning that my manual tinkering is completely and utterly unnecessary? Any help much appreciated. Cheers, Steve.