(Admin) is not in the sudoers file. This incident will be reported.
So I got a Mac on OS X El Capitan and I am having trouble using sudo from the admin; yes the main admin, I repeat, ADMIN account. Each time I use a sudo command the error message pops up.
"(Admin name) is not in the sudoers file. This incident will be reported."
How can I fix this? This ain't ordinary.
MacBook Pro with Retina display, OS X Yosemite (10.10.5), Once running OS X El Capitan Beta