This listing is for a single 250GB Hard drive that was pulled from a MacBook Pro running Mac OS High Sierra
the high Sierra operating system will only work for 2010 - 2012 MacBook Pro 13" , 15" and 17" A1286 and A1278 model
although you can just wipe the drive and use it as a secondary source to hold data or reinstall an operating system of your choice by your self.
Apple has put various brands of hard drive in their laptops, brands may include Toshiba, HGST, Hitachi, Samsung, or even WD.
Copyrights and/or trademarks and/or names used belong to their respective owners and are not being sold. These are authentic Hard drives pulled from authentic MacBook Pros that have been reset, parted out, upgraded etc.. as a disclaimer you are buying the hard drive not the software nor what is on the hard drive.