The same thing happened to me, luckily on a test unit. Seems like
firmwarepasswd wants user input, rather than the password in a
parameter. In my case the password was blank, as it sent a newline. I
suggest you try booting the machine, running sudo f...
Also encountered the same problem. Tested on 10.9, 10.10,10.11. Casper
Recon 9.81.Works fine on Self-Enroll. Workaround:(Ensure your Apple
Developer ID Installer cert and key are in your keychain) productsign
--sign '' ./QuickAdd.pkg ./QuickAddSigned...
