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heiko257 Author

Level 1

5 points

since MacOS update from 12 to 13 USB to serial converter doesn't work anymore

Hello,

I'm using my MacBook M1 to drive a digital controller for model trains. This controller is connected via USB and has an FTDI chip for converting USB to serial communication. Using MacOS Monterey, the digital controller worked fine. Since update to MacOS Ventura, the communication to the digital controller doesn't work anymore. I can see the USB device in system information but without any communication port. It looks like the port driver is missing. same digital controller works fine at iMac 2020 with Intel and Ventura.

MacBook Pro 14″, macOS 13.0

Posted on Nov 8, 2022 11:03 AM

Top-ranking reply

Keith Barkley

Level 7

21,042 points

Posted on Nov 11, 2022 6:29 PM

It works fine on my M1 24" iMac. I even tried 2 different FTDI chips.

Here is the terminal session determining which file in \dev to use. Note that the first ls has two entries, while the second ls after I plugged in the FTDI shows three. The last line is the screen command used.

Here is the screen session with the FTDI serial device in loopback showing that I am transmitting and receiving.

One thing is that FTDI is clamping down on non-FTDI chips. It could be that the driver will only work with FTDI.

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since MacOS update from 12 to 13 USB to serial converter doesn't work anymore

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