Mac OS X 10.7 Lion + ATEN UC232A USB to Serial Adapter

32- and 64-bit PL2303 drivers for OS X 10.6 are available here.

You'll need to modify, as root, the '/System/Library/Extensions/ProlificUsbSerial.kext/Contents/Info.plist ' file after installing the driver to suit the USB manufacturer and device ID. For the ATEN UC232A, examples below appear to work for it (for me in 10.7).

To obtain the IDs, Wayne Roberts (who informed my via the SAGE-AU mailing lists), used 'USB' which comes with the developer tools/XCode.

Modify the current lines of the XML:

# <key> can be the Hex values as 'Vendor'_'Product', Wayne thinks this is more cosmetic however.


# <idProduct> and <idVendor> should be the decimal of the respective values, as per USB

Once you've done this, either restart the machine or run 'kextunload' and 'kextload' on ProlificUsbSerial.kext and it should show up as /dev/tty.usbserial.

** If you have installed the UC232A Drivers, either rm or mv the 'UC-232AC.kext' before the reboot to avoid conflicts **

Related Posts

Book REVIEW: Linux Service Management Made Easy with systemd: Advanced techniques to effectively manage, control, and monitor Linux systems and services 1st Edition

Amazon Link Disclaimer: I get no royalites or anything here – Just had coworkers ask me about it So since I’m no systems guru and am now…

CLI Templates for Python + Rust

Do you also write a lot of services that need a few CLI option (e.g. –config) and or little CLI tools from time to time? Want a…

Stop IPv4 Point-To-Point Addressing your Networks

IPv4 addressing on links is no longer required to route IPv4. What you say?? Yes, you can stop IPv4 addressing your point to point links with Legacy…

NAT64: Using `jool` on Ubuntu 20.04

I found that jool has very good tutorials, but all the commands to get going are hidden in these large tutorials. Here are the steps I took…

Raspberry Pi Powered Fireplace

Mr Aijay Adams and I am back making my Fireplace Internet / Smart device controllable. Now, via a very sexy Web UI, when I’m heading back to…


Are you using the latest Linux kernel firewall?. Here are some notes I’ve saved that I use and forget all the time. I plan to add to…

This Post Has 12 Comments

  1. Thanks for these tips. Unfortunately I am like Marton, where the Aten device can be seen in USB device tree (via 10.7 AKA Lion, System Profiler) but /dev/tty.usbserial isn’t there and I don’t seem to be able to communicate with my attached Zebra serial barcode printer via the ATEN UC232A.

    Any other advice. Many thanks in advance!

  2. Buggar for both you two. You sure you edited the device? You don’t have any kexts from other drivers conflicting do you? I did and had to manually rm it …

  3. Thanks for the tip. I had this ATEN adapter working before and got broken when updating for Lion. Look’s like working now, but with with a different device name than before. No biggie.

  4. Add another product vendor key to support multiple vendors

    Using the Prolific 1.4 version of the driver ( you can just add another block. So in the end you have something like this:


    This way different vendor’s usb-serial adapters will work (ATEN and Prolific OEM in my case)



  5. The extension doesn’t load at boot. This only works for me, when I go to the terminal and execute: sudo kextload /System/Library/Extensions/ProlificUsbSerial.kext/

    How do I get the extension to load automatically at boot?

  6. (I forgot to tik the two “Notify me of…”. So just delete my previous post.)

    The extension doesn’t load at boot. This only works for me, when I go to the terminal and execute: sudo kextload /System/Library/Extensions/ProlificUsbSerial.kext/

    How do I get the extension to load automatically at boot?

  7. This post got me very close to getting my Aten UC232A working on OSX 10.7.5, I had to change what I added to Info.plist

    Here is the entire Info.plist my additions are line numbers 45 through 61. Once I made the additions the performed kextunload then kextload everything is working perfect.

    5 CFBundleDevelopmentRegion
    6 English
    7 CFBundleExecutable
    8 ProlificUsbSerial
    9 CFBundleGetInfoString
    10 ProlificUsbSerial v2.2.0, Copyright 2006 Prolific Technology Inc.
    11 CFBundleIdentifier
    12 com.prolific.driver.PL2303
    13 CFBundleInfoDictionaryVersion
    14 6.0
    15 CFBundleName
    16 Mac OS X Driver for Prolific USB-to-Serial Bridge Device
    17 CFBundlePackageType
    18 KEXT
    19 CFBundleShortVersionString
    20 2.2.0
    21 CFBundleSignature
    22 ????
    23 CFBundleVersion
    24 2.0.0
    25 IOKitPersonalities
    27 067B_2303
    29 CFBundleIdentifier
    30 com.prolific.driver.PL2303
    31 IOClass
    32 com_prolific_driver_PL2303
    33 IOProviderClass
    34 IOUSBInterface
    35 bConfigurationValue
    36 1
    37 bInterfaceNumber
    38 0
    39 idProduct
    40 8963
    41 idVendor
    42 1659
    45 0557_2008
    47 CFBundleIdentifier
    48 com.prolific.driver.PL2303
    49 IOClass
    50 com_prolific_driver_PL2303
    51 IOProviderClass
    52 IOUSBInterface
    53 bConfigurationValue
    54 1
    55 bInterfaceNumber
    56 0
    57 idProduct
    58 8200
    59 idVendor
    60 1367
    65 OSBundleLibraries
    68 1.0.4
    70 1.8
    72 10.0.0
    74 10.0.0
    76 10.0.0

Leave a Reply

Your email address will not be published. Required fields are marked *