Allow user to administer this computer"
is grayed out, just bought my macbook pro yesterday and I set it up today, I only have ONE user and it is the admin user by default. I was traying to install skype and it kept saying I couldnt install it because I didnt have enough privileges. why has it gone off? when I created my account and set it up as admin I was able to check and unchek that option and it just said it needed to reboot to apply changes. but now it doesnt show up at all. It is ticked, but it is greyed out.
I have been trying to find a doable solution online but they all seem too much to do (prompts and DOS, etc)
one thing that I noticed is: if I create a new user called TEST and make that user ADMIN when I log in with the account I am having an issue with, the option is not greyed out anymore, but the moment I delete that TEST account it's back to beign greyed out.
with this account I can lock and unlock the options to modify (add/delete new users) but I cannot make that option to come back on.
Evidently, Having that option is causing a problem cause it doesnt let me customise, install or use certail apps, functions etc, so i need that resolved.
I know the easiest way it is to create a new ADMIN ID and then delete that one, but... what if it happens again?
I dont have the Mountain Lion DVD to reboot and stuff and I am not sure I want to mess up with black screen commands, etc.
any thought?
Thank you so much!
MacBook Pro, OS X Mountain Lion (10.8.4), upgraded via App store.