Thanks Rob. Yes, that is exactly the issue.
Not sure though if its older adapters and/or extension application programs that don't support the new standard. As far as I understand the Silabs CP210x bridges are still very common serial/USB adapters. And they have released specific
driver extension application programs
for the Mac of less than a year old. But somehow it goes wrong between the INDI driver and the extension program.
It would indeed be great if we could somehow find a solution. For now I've gone back to my Ubuntu machine, but would like to keep using the Mac.
One thought came up and that is that the error message is about not able to acquire a Serial Number from the focuser. Would it make sense If we try to delete that request the driver makes and see what happens? If it is really the connection, we may just get a similar error but then with the next request from the driver. However, if it has something to do with the focuser not presenting its serial number through this new interface correctly, it may work. Having the serial number is not crucial.
Yes, you are right, where there are issues like this, it would be good to include some documentation on that. At the time I had written a few lines that we might be able to use:
For the Sesto Senso 2 and Esatto focusers this could look like:
For this INDI driver to work properly on a Mac, a separate USB-Serial driver needs to be installed. The legacy Silabs driver version 4.* can be found here . Installation requires macOS 10.14 (Catalina) or lower. So far, it has not been possible to establish a proper connection using either driver version 6.* or macOS 11 (Big Sur) and higher.
For the Microtouch focuser (based on another thread on this topic), it could look like:
For this INDI driver to work properly on a Mac, a separate USB-Serial driver needs to be installed. The latest Silabs driver can be found here . This driver has shown to work on macOS 12 (Monterey) and is likely to work on 10.14 (Catalina) and 11 (Big Sur). For older macOS version, the legacy Silabs driver may be required, which can be found here .
Even so, it would be good to know from people who have no problems with focusers and their Macs, for which it could look like:
For this INDI driver to work properly on a Mac, no separate USB-Serial drivers need to be installed. The required drivers are embedded in the macOS. This has been tested on macOS versions .....
Please let me know if there is anything I can do to help here. I understand this is a difficult issue and I'm unfortunately not a software engineer. But I can test things out.
Best regards, Willem Jan.