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You may not have to do this at all if a previous version of the driver had already been installed on your computer before you upgraded to macOS Mojave. Please first check what kind of USB serial adapter you are using. The important thing here is not the manufacturer of the adapter of which there are many , but the manufacturer of the adapter's chip set.

Please use our instructions at the end of this page to determine the type of USB serial adapter that you are using. If you are using an adapter with an FTDI chip set e.

Keyspan USB 2 port to Serial crashes computer after latest driver installed

Here is Tripp Lite's download page. Note: Driver version 4 for macOS This no longer seems to be a problem in the installer of driver version 4. If you are using an adapter with a Prolific chip set e. As of September Prolific offers: driver version 1. Here are two ways to identify what kind of USB serial adapter or corresponding hardware driver you are using. If the adapter is connected, the manufacturer of the adaptor and of its chipset may be displayed in the macOS system report. Then you need a driver for this adapter.

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Support from your vendor Because of the large number of available USB serial adapters, we cannot support these adapters and their drivers. Please Wait. Submit Your Reply.

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Thank You,! Report Offensive Content. Select type of offense: Offensive: Sexually explicit or offensive language. Spam: Advertisements or commercial links. The System Report - Extensions section says the driver is not loaded.

Driver for high speed USB serial adapter.

Plugging in the Keyspan's USB plug produces a crash within a few seconds. The computer eventually offers a login screen and after logging into my account the adapter works, and the driver shows as loaded. If I leave the serial adapter plugged in and later shut down and restart the computer I get a kernel panic after entering the password to my account. The computer recovers after a few moments and presents the login screen again, and all is fine from that point on. The device works and I see no further kernel panics until the next reboot.

I can live with it, but can't help but worry that some harm may come to my system operating this way.

Serial Adapters

Curious on something here. When I run the installer on Fresh Install Did you all install from the command line or by double clicking the package? May need to go back to Mavericks or Yosemite because I need this tool for my job. I've tried both from double click on package and on command line. Same error both ways. Error from command line is I was hoping for more detail from the command line for what caused the error :.

Contact the software manufacturer for assistance. Nov 4, AM. Nov 4, AM in response to louser In response to louser. Rrettke above found the installer would not complete cleanly if the 'USAdriverFolder' was selected. So you might give that custom install of the driver only a try with the 19HS package. The end result should be a kext file KeyspanUSAdriver. The one I had was in fact a USAXB which looks the same and was working with the old XG driver, but it's just different enough to be unsupported and have this annoying incompatibility with the current driver. Now with a bona fide 28XG all is well under El Capitan.

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Missed that part on the folder the first read through. But tried that this last time and it worked probably while you were writing you post a minute ago.

KeySpan USB-to-serial adapter (Pete's notes)

Also, just did the standard GUI double click method for installing, as well. Attempted using the driver with "screen" like normal and all good. Into my routers and switches again. Saved me from going back to Mavericks or Yosemite. Removed option for USAdriverFolder choose driver only. Reboot was not required. KeySerial1 8N1" would connect at baud 8 data bits, no parity, 1 stop bit. Dec 17, PM in response to louser In response to louser.

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Thanks so much louser! I couldn't find the link on the tripplite site but the link in your post above, and the driver it downloads, worked perfectly with a clean install of Using a 28XG. Dec 17, PM.

Remove Keyspan USB Serial Adapter 2.1 Completely under Mac OS X

Mike, thanks for this post. You said you replaced yours " with a new one " - where did you find one? It's an old discontinued part and I'm having trouble finding any place that stocks it anymore. Dec 29, PM. Communities Contact Support.