November 17, 2018

So I took the following steps, staying completely away from the Keyspan Serial Assistant. Nov 4, I hope someone can figure this out. Feb 22 5: Reboot was not required. The Keyspan flashes green which means it’s ok I guess, and the driver is installed but my device an X10 CP does not show up.

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STX must be a nemonic for some byte, no?

Keyspan USB adapters hardware and software matrix

This is quite annoying. Oct 2, 8: Plugging in the Keyspan’s USB plug produces a crash within a few seconds.

I can install the driver alone but it does uas work. I know this 19q the most popular thing to do these days, but I am attempting to control a device through serial commands. That may not be critical, but something is still wrong in my case and a cold boot, with the device plugged in, following install results in my machine crashing. If you need USB to serial adapter functionality in OSX for a native application, then the driver should be installed in OSX and not installed in the classic environment.


December 12, mad 7: If there are I’ll report back. Nice post, but I still could not get it to work. Sounds to me like there’s a deep conflict somewhere in an old driver that didn’t properly uninstall or a perceived hardware conflict. Notify me of new posts by email. The system tries again and boots properly on the second try.

Keyspan USA-19QW Free Driver Download (Official)

Mike, thanks for this post. It’s an old discontinued part and I’m having trouble finding any place that stocks it anymore.

Feb 23 4: Anyone have thoughts on this? Note that many of the software versions marked as working under OS9 will also work in the “classic” mode of OSX.

Keyspan Serial Assistant download for Mac | MacUpdate

Extensions opened through About This Mac; System Report indicated that the driver had been found but not loaded. Believe it or not I use the 119qw Lite USAHS on at least a weekly basis and is an upgrade deal breaker if support has been eliminated or if the manual steps to enabling support are unwise. I found out that the download plugin introduced some bugs and required disabling some features to make downloads work again.


Again, Thank You and have a happy holiday. Oct 19, I has a look at it after reading your message.

Help Keyspan USAQW Driver Needed

Oct 19, 1: Also, just did the standard GUI double click method for installing, as well. I restarted the computer, to see if the driver would become loaded, but it was not Reply Helpful Thread reply – more options Link to this Post.

I would try this more traditional route before turning to command line tricks. May 7, at 9: Feb 21 7: Question marked as Solved User profile for user: Oct 16, 8: Appreciate your file and help. Feb 22 6: Wow, this is a great resource – I was a little lost here.