I tried to find an answer to my question on this forum, but I had no luck. So, let me relay what I have done, and what I want to do.
I have a NEC ND-4570A inside an external DVD case, attached to my Mac Mini via a USB 2 connection, and I am running the latest version of Mavericks. I did download the NEC / Optiarc Version 1.03 file for Mac OS, along with the Original NEC ND-4570A firmware 1.03 file from http://liggydee.cdfreaks.com/page/en/NEC-ND-4570A/.
I then went ahead and followed the instructions to 1) dump the firmware from the drive, and 2) flash the firmware with the command:
/.necflash -flash 103bt_rpc1.bin A:
This did successfully change the name of the DVD burner from Sony to NEC, along with the 4570A model number change. Here in fact is the System Information for Disc Burning )accessed through About This Mac):
"NEC DVD_RW ND-4570A:
Firmware Revision: 1.03
Burn Support: Yes (Generic Drive Support)
Profile Path: None
Cache: 2048 KB
Reads DVD: Yes
CD-Write: -R, -RW
DVD-Write: -R, -R DL, -RAM, -RW, +R, +R DL, +RW
Write Strategies: CD-TAO, CD-SAO, CD-Raw, DVD-DAO
Media: To show the available burn speeds, insert a disc and choose File > Refresh Information"
But, I still need specific instructions on 1) how to see what the Region Code is now, and 2) how to set the Region Code to 0 (I am trying to process some Korean DVDs for my wife. On my (soon to be sold) Mac Book Pro, with a Matshita DVD-R Uj-85j DVD player, it reads these DVDs just fine)). Do I need some other files for these tasks? And, if I do, where can I get them?
I would appreciate any assistance.