MacBook Pro 'retina' Late 2013
To open the Mac you need a PL4 Pentalobe screwdriver.
The motherboard number is on the lower left corner of the motherboard, hiding under the SSD.
The ROM in on the top (easy to reach) side of the motherboard.
The ROM is a SOIC-8 chip (64Mbit).
To read or write ROM use Medusa with A4052 EasyFlash adapter.