Kinda...
You should ALWAYS back up your stuff before an upgrade.
But no, this isn't a fresh install unless you specify so. Standard setting is to upgrade.
Yay!
I'm on my first Mac so who can help me out here...
I currently have Lion, and I have a bunch of photos and some movies stored locally. Do I have to back everything up before running the update? is this going to be a fresh install?
You should ALWAYS back up your stuff before an upgrade.
But no, this isn't a fresh install unless you specify so. Standard setting is to upgrade.