Allow Apps won't unlock in Security & Privacy - El Capitan I am attempting to use an unsigned app. However, the options are grayed out under "Allow apps downloaded from". I did click the lock to unlock it, but still grayed out. I am an admin on my machine.

Is there a way that I can change that setting by editing a file?
Log in as Administrator; unlock the SystemPreferences->Security&amp;Privacy Applet (left bottom), then click the General tab when it is not already chosen: check the middle Allow line.
Hold the Alt/Option key while selecting/opening the App.