"The user executes the file which contains shell commands that gain complete control over the computer."

Perhaps someone could verify the following.

If a user is logged in without privileges (not the admin user for example on Mac but a "standard user") then there is no (is there?) way to "gain complete control over the computer" without entering an admin user and password later in the process.

Typically I operate two (or more) logins under OSX. One is "standard" user and one is "admin" user. I only browse under "standard" user never under "admin" user. To me "admin" user really serves no purpose but needs to be there for obvious reasons.

This way I always have to enter the name of an admin user in order to install or make any system changes.

Further, from the command line I would need to do:

su <admin user name> [password]

and then

sudo -s [password]