I get an error on the status line at the bottom of the screen Seems to me that all worked fine until I installed Lion as it was fine with Snow Leopard. Serial Port - tried /dev/tty.usbserial and /dev/cu.usbserial Was not working with older version of Decoder Pro so installed Decoder Pro3. I updated the drivers which are reported to work with Lion. Have not used Decoder Pro for about a year now. Vendor ID:Đx067b (Prolific Technology, Inc.) Java HotSpot(TM) 64-Bit Server VM (build 20.8-b03-424, mixed mode) I have followed the install guide for Mac at I am trying to connect to an NCE Power Pro system. I have also tested it using the same USB port on the Mac when I run WinXP with Parallels so I know the hardware is fine. The adapter works fine on my Win7 laptop. I have been using a PL2303 USB/serial adapter with my Mac for a couple of years. Jay Searle toggle quoted messageShow quoted text I believe there is instructions in the download about the. It looks like the sourceforge driver has been port to Lion, follow the link above. kext files and delete them so the new one would be pointed to. Unfortunately, the install of a driver over an existing driver in OSX required me to go in and find the prolificUSB. I found a sourceforge project ( ) that developed a driver and after installation, the port worked. The prolific driver from prolific did not work correctly, and actually after much internet searching I discovered that supposedly, the USB to Serial bridge in the 2303 doesn't fully implement the RS-232 protocol, which can cause problems with OS's. That was with leopard and then snow leopard. I had a similar issue with my USB/Serial converter with a prolific 2303 chip when I was trying to use Drivewire to serve files to my COCO.

Usb to serial mac os x native