Old version of Lightburn with newest MacOS possible?

You can always download the newest trial version 1.4.01 and see if that fixes the problem, The trial is fully functional and is free to use for 30 days. If that does fix it the $30 license fee for one year of updates is a smoking deal. The software will continue to function well after the license period expires. I do recommend updating to the most recent version as there have been many improvements and added functionality.

I have found a similar thread pertaining to connection issues with ikier k1. This may or may not be relevant to your machine if nothing else works. They discuss the USB C port as a potential issue, using a USB hub has solved connection issues for M1 based mac. First plugging in the hub and the plug the laser into that… Click the link to the thread below.