I bought a Mac Book Pro 6 from a liquidation auction sale. All was working fine until I went to add a drive to it to use as a backup. The Mac keeps disconnecting the drive so I can’t copy anything to or from a USB storage device. The USB ports work as I have a mouse and keyboard plugged in. On contacting the company their sales conditions were sold as seen so they couldn’t help, even though I have a receipt of sale. I have read that there may be a firmware password enabled, but I can’t find anything on the Mac to disable it. How can I check if there is a password and is there a way I can reset the password, or if I can’t is there a work around where I can attach a drive to use as a Time Machine back up device?
Thank you.