I've got an old firewire hard drive. No USB connection on it. My Mac has no firewire connection on it. I bought one of these: Firewire IEEE 1394 6 Pin Male to USB 1.1/2.0 A Male Adapter Convertor Connector | eBay, physically it fits fine, hard drive fails to mount and isn't seen at all in Disk Utility. Any ideas how to access the drive on my Mac? Thanks.