USB to Serial Adapter for Mac OS X Lion with Driver

Find a USB to serial adapter that uses the Prolific part number PL2303 chip. I have the Tripp Lite USB to Serial DB9M Adapter (U209-000-R) that sells for $17 on Amazon.

“The PL-2303 USB-to-Serial Bridge Controller is a low cost and high performance single chip solution. It provides a simple and easy way to use bridge/connectivity between the Universal Serial Bus (USB) and Serial Port interface. With the advantage of USB port, users have the capability to utilize the peripheral with serial port interface in an easy-to-use environment such as plug and play & hot swap function.”

PL2303 Mac OS Snow Leopard and Lion Driver

PL-2303 (H, HX, X chip version) Mac OS X Universal Binary Driver v1.4.0 (DMG file format), Prolific Edition For Mac OS X 10.7 Lion and 10.6 Snow Leopard (32-bit and 64-bit kernel)

I didn’t use above but used driver from http://xbsd.nl/2011/07/pl2303-serial-usb-on-osx-lion.html and followed directions from website.

download osx-pl2303.kext.tgz and extract
cd /path/to/osx-pl2303.kext
cp -R osx-pl2303.kext /System/Library/Extensions/
next you need to fix permissions and execute bits:
cd /System/Library/Extensions
sudo chmod -R 755 osx-pl2303.kext
sudo chown -R root:wheel osx-pl2303.kext
cd /System/Library/Extensions
kextload ./osx-pl2303.kext
kextcache -system-cache

Terminal / Console Software

Zterm v1.2 works on Lion.

Other USB to Serial Adapters that Use PL2303

I don’t have access to below items but they use the PL2303 chipset and should work with above drivers.

Plugable USB to RS-232 DB9 Serial Adapter With Prolific PL2303HX Chipset — $11.95 on Amazon

USB to RS232 Serial Adapter Cable DB9 With Prolific PL2303 Chipset — $3.24 on Amazon

Syba SY-ADA15006 USB A Male to Serial Cable DB9 (RS232) — $9.97 on Amazon

ATEN USB to PDA/Serial (DB9) Adapter w/ PC & Mac Drivers UC232A — $24.20 on Amazon

Will add more as I learn about Adapters that use PL2303 chipset.

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Filed under: How To Guides