Install Prolific USB To Serial Adapter Drivers On OSX Lion, PL-2303 Mac Drivers
Tonight I needed to console into a old Cisco 2900 switch to test a couple password related items and it was the first time that I would be using USB to Serial adapter on my Macbook. Previously there had been a lot of issues with the adapter I have, which is a PL-2303, and getting the right drivers installed on Windows 7 64-bit so I was thinking there might not even be drivers available for OSX Lion. After a little research I cam across an article that purehate had written on QD however after following the instructions in the article the USB to Serial adapter still was not working. Below is information on installing newer drivers that will work on OSX Lion.