So after finally be forced into it, I will be upgrading my Macbook from Leopard to Mountain Lion, with the required stop off at Snow Leopard (already bought the disk).
However, after having the Macbook for four years, I have a lot of e-mails, address book entries, iCal dates, etc. that I'd like to keep.
How do I save these? Do they stay on the computer after the upgrades?