I don't remember seeing the option in Snow Leopard so I think it's new for Lion, but you can attach your Apple ID to a user account by simply entering the details on install, or going into the Users & Groups preference pane.
However, I can't for the life of me perceive any benefit in doing so? The two apps that ask for it the most, iTunes and the Mac App Store, still ask me to enter my blood Apple ID for every single action I want to check.
I can understand the possible security concerns for entering it when making a purchase or such, but surely I should just be able to get an administrator style prompt to fill in the details, or maybe a keychain-style one such that I can have iTunes or the Mac App Store sign me in automatically for these things all the time, and I'll handle keeping miscreants away while I'm logged in.
I dunno, it just seems really pointless since you end up having to enter the details all the time anyway
However, I can't for the life of me perceive any benefit in doing so? The two apps that ask for it the most, iTunes and the Mac App Store, still ask me to enter my blood Apple ID for every single action I want to check.
I can understand the possible security concerns for entering it when making a purchase or such, but surely I should just be able to get an administrator style prompt to fill in the details, or maybe a keychain-style one such that I can have iTunes or the Mac App Store sign me in automatically for these things all the time, and I'll handle keeping miscreants away while I'm logged in.
I dunno, it just seems really pointless since you end up having to enter the details all the time anyway