user switching is a good tool to use if you have multiple users. It
is a way for multiple
users to be logged in at the same time and to easily and quickly switch
between the two users. To set it up go to your system preferences, accounts
and first you need to make sure that you have more than one account.
Click on the lock and enter your password to make changes. Then you want
to click on Login Options. Then check Enable Fast User Switching. A dialog
window pops up warning you that you should trust the other users if you
are going to use this feature, I do, so I’ll click ok. Now you
can close system preferences. If you look at the top right of the screen
now it’s displaying my user name. If I click on my user name, a
window pops out that displays all of the users, so now I can select another
user and log into that account while my own account still stays active
and exactly the same.