When you complete the mv command above, you’ll get a pop-up warning from OS X claiming that the driver was installed improperly (we fix that later in the instructions), just click OK and ignore it.Īfter you complete the above steps, inserting the adapter in a USB port should automatically create a device in /dev for the serial port. Shell$ sudo chown -R root:wheel osx-pl2303.kext/ shell$ sudo kextload. Shell$ sudo chmod -R 755 osx-pl2303.kext/ Shell$ sudo mv osx-pl2303.kext /System/Library/Extensions/ The instructions to install the driver that I used are, from Terminal: shell$ tar zxvf The driver I used can be downloaded here: The original WLANBook Blog Post is here: The ATEN adapter is based on the PL2303 (H, HX, X chip version) USB-to-Serial Bridge Controller, so these instructions should work with a variety of adapters other than the ATEN (including the Tripp Lite USB to Serial DB9M Adapter (U209-000-R) ($8)). In order to bring light to this astonishingly good news, I’m re-blogging the instructions with appropriate credit. So, I opted to try it out under Mavericks as well and…it works. I borrowed an adapter from a friend of mine, the ATEN USB to PDA/Serial (DB9) Adapter w/ PC & Mac Drivers UC232A ($19.22), to see if it would work.Īfter 3+ hours of trying to get various drivers working, I was no closer to a working solution.įortunately, my same friend was able to find the two year-old blog post documenting a setup that worked under Mountain Lion.
Keyspan does not show a driver that supports OS X 10.9 and loading the 10.8 driver resulted in no change from not having the driver.
I’ve always been able to get it to work properly, but recently, with my upgrade to a 15″ MacBook Pro Retina Display and subsequent upgrade to OS X 10.9 Mavericks, my trusty little friend may have met his day. I’ve carried a Keyspan USA-19HS with me in my briefcase for close to a decade (maybe more).
I often do work that requires a serial port. Appears that with the coming of OS X 10.9 Mavericks, we are once again faced with various peripherals that cease to function correctly.
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