I got a laser barcode scanner from ebay for a song and now I'd like to use it to catalog my enormous DVD collection. It has a PS/2 plug, but no such port on my MBP. A cheap straight-through PS/2 to USB adapter didn't work. The scanner received power and would read barcodes, but the data was not sent through to the machine. I purchased a well reviewed USB - PS/2 adapter from DealExtreme (https://www.dealextreme.com/details.dx/sku.6175) and when I plugged it in the first time, it asked me to identify the keyboard by pressing the key to the right of the left-shift. There are no keys on my scanner, so what the heck can I do to get it identified? Is there a way to trick it into using a generic keyboard layout?