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.
Install PL-2303 Prolific USB To Serial Adapter Drivers On OSX Lion:
If you have a version of OSX prior to Lion you may be able to use the below drivers but if they do not work then you should use purehates article which is linked above. The other information in the article is still valid such as once the device is installed you can use ZTerm or SecureCRT to make the serial connection to a Cisco router. I personally prefer using SecureCRT but since it is a paid application you may prefer ZTerm instead.
Anyhow download the drivers located here to install the PL-2303 drivers on your Mac running OSX Lion. The file downloaded, which is named md_PL2303_MacOSX10.6_dmg_v1.4.0.zip, should be extracted once the download finishes. Next open the PDF that is included to find out more information about how to install the USB to Serial Adapter drivers and then how to use the adapter once it is installed properly. You will double click the PL2303_1.4.0.dmg file to install the drivers. Once installed open the System Profiler by double clicking on “System Information.app” file located in the Utilities folder underneath the Applications directory. Once launched click on USB located under Hardware in the left navigation menu which should now display USB-Serial Controller as shown in the below example image.
PL-2303 USB-Serial Controller Displaying In System Profiler:
You should now also see USB-Serial Controller on the Network configuration window located underneath System Preferences as shown in the below example image.
USB-Serial Controller Displayed Under Network Configuration Window On OSX:
You should now be able to use your favorite console client on OSX to connection to devices using a serial cable.