Isn't some of that just sent as registration info to Apple?
And as for that, you can change the computer name (as seen over networks and in the Login Window) in the Sharing pref pane, and your user's full name can be changed in the Accounts pref pane. The other things *may* be in your Address Book card, but I'm not sure about that.
If I recall correctly, the info to which you are referring is not actually kept on your computer. What you were filling out was the registration of your software that it sends off to Apple when you finished.
As far as the user name on the computer itself, you can go to the System Prefs and just create a new admin user and delete the old one.
Yeah, that gumph is pretty irrelevant: you can fill it with complete gibberish and it will go through without a problem (I know this because I did a clean install on a spare drive for investigative purposes and decided to dick around a little). The main thing Apple gets from it is whether you're using the Mac at home or in business and whether or not you want email newsletters.
If you just want Apple to know you have the machine, much the same stuff is provided at https://register.apple.com (in fact, this is where you end up if you click the "Later" option at the end of the install process), and I don't see why there should be anything to stop you registering it there.
Spart, while those details are right, they're just internal to the machine and network, and won't communicate anything to Apple. I don't recall if any of those details automatically get inserted into Address Book for you, other than it creating a card with your name on it.
Actually, some parts of that are important. Your first and last names are used as the basis for your login name, by default. You can, of course, change that during the installation.
However, if you later decide you don't want 'pookieschnookums' as your login name in the future... well, your only options are to create a new user and manually copy your files & settings, or backup your data and reinstall OS X. You can't actually change your login name (short name), though you might be able to change the descriptive name from another account with Admin capabilities.
If you're already in an admin account, you can give any other user admin privileges and just copy the entire content of the user folder across., then log in as that user and delete the other one.
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And as for that, you can change the computer name (as seen over networks and in the Login Window) in the Sharing pref pane, and your user's full name can be changed in the Accounts pref pane. The other things *may* be in your Address Book card, but I'm not sure about that.
As far as the user name on the computer itself, you can go to the System Prefs and just create a new admin user and delete the old one.
Moving to Mac OS X...
If you just want Apple to know you have the machine, much the same stuff is provided at https://register.apple.com (in fact, this is where you end up if you click the "Later" option at the end of the install process), and I don't see why there should be anything to stop you registering it there.
Spart, while those details are right, they're just internal to the machine and network, and won't communicate anything to Apple. I don't recall if any of those details automatically get inserted into Address Book for you, other than it creating a card with your name on it.
However, if you later decide you don't want 'pookieschnookums' as your login name in the future... well, your only options are to create a new user and manually copy your files & settings, or backup your data and reinstall OS X. You can't actually change your login name (short name), though you might be able to change the descriptive name from another account with Admin capabilities.