Hi, I also bought Voodoo5 5500 PCI for MAC, and tried to flash and failed.

1. I've downloaded flash utility and also 1.18 bios for PC from http://welcome.to/3dfxbios.
2. switched to MS-DOS 6.22 from booting A
3. Run utility and it kept saying "unknown EEPROM manufactuer"
4. Even Windows XP recognized as Voodoo5 as unknown VGA, but didn't work due to bios.it seems like graphic card is not dead.

My system spec is as follows.
AMD64 Benice 3000, Nvidia FX5900 AGP, 512MB RAM

I also tried with 1st PCI and 2nd PCI slot.
And changed AGP graphic card to Nvidia TNT2, Geforce2 MX, and Savage Pro.

But everytime utility kept saying that unknown EEPROM.

EEPROM on Voodoo5 is AMTEL AT49BV512, and on Voodoo5 board, bios is 1.3FO.

I desparately need you guys help..

My e-mail is buendia@korea.com and send me any info if you have been successful flashing bios.

Thanks.