I've got a problem that while installing El Capitan from USB Installer it says "copy of software is corrupted etc..etc". Actually I downloaded the copy of El Capitan from another Mac and then I created "El Capitan installer from my own Mac with terminal process and when I try to install it it says the above message "copy of software is corrupted etc..etc". So tell me please anyone what happened and if it's date fault, then what date I should set because I didn't download El Capitan on the Mac on which I want to install it.
Please can anyone help me to sort out this problem??