Mac Forum / Applications / Mac Applications / March 2008

The 'enter time machine' graphics are not for those who are
restoring from backup, they are for finding that one file
(or one email, or one address) that you need.  The time
slider on the right, and the zippying back through the
various views of your data is a pretty useful interface as
far as I'm concerned. I've only used it a couple of times,
but it was simple to use, quick, and it got my right where I
needed to be very easily.

Does it matter for an application that we run once in a blue moon?

The time line on the right is useful to quickly move to about the
right spot, then we have a finder.   It's obvious that we are in Time
Machine because of the full screen.

You'd have a folder named "Developer" at the root of the startup volume.
Xcode is something you would have to go out of your way to install. So
unless you remember installing it, you probably don't have it.

Peculiar. Yours is exactly the same.

So can you take a screen shot of the error message you see when you try
to change the default application for that property list file?

Ummm... I gave you complete steps for how to do it yourself right here.  
It's not complicated at all. Want tham again?:

Removing Admin Privileges From Your Normal Account

The initial user account Mac OS X creates during installation is an
administrator account. But running with higher privileges than needed is
never a good idea. You really shouldn't give your normal, every-day
account administrator privileges. When you are logged in as
administrator, everything you do, every program you run (directly or
indirectly, purposefully or inadvertently) is executed with
administrative privileges with access to more parts of the system than
normal users. So if you make a mistake, or worse, if you unknowingly run
a trojan / worm in that account, you can damage and alter critical
system files with little or no acknowledgment from the system.

Mac OS X is designed such that you can accomplish all administrative
tasks from a non-administrative account simply by entering the username
and password of an administrator when prompted. So while you do need to
*have* an administrator account, there's really not much of a reason to
run as administrator for day-to-day use.

The secure thing to do is to create an account just for administration,
then remove administrator privileges from your day-to-day account.
Here's how to do it:

First, open and unlock the System Preferences > Accounts panel.

1. Open System Preferences.
2. Click Accounts.
3. Click the lock icon to unlock the panel (if needed).

Next, create a new administrator account:

1. Click the [+] button. A new user account sheet appears.
2. In the Name text box, enter "Administrator" (without quotes).
3. In the Short Name text box, enter "admin" (without quotes).
4. In the Password text box, enter a secure password. If you need help
creating a secure password, click the little key icon to the right of
this text box, and an assistant will help you come up with a secure
password.
5. In the Verify text box re-enter the secure password.
6. Check the "Allow user to administer this computer" checkbox.
7. Click Create Account.

Next, remove administrator abilities from your normal user account:

1. Open System Preferences.
2. Click Accounts.
3. Click the lock icon to unlock the panel (if needed).
4. From the account list on the left side of the System Preferences >
Accounts panel, highlight your normal user account name.
5. Uncheck the "Allow user to administer this computer" checkbox.

That's it. Now whenever you are asked for an administrator account's
credentials, you can enter user name "Administrator" (or "admin") and
the associated secure password.

It's simple - you just specify the full path in the ls command - like
this:

    ls -al /System/Library/LaunchDaemons