I just opened Lightburn on my macbook running Catalina, and got a message from the OS saying that the legacy kernal won’t be supported in future versions and to contact the developer. I clicked the link and it took me to an apple support page with this text.
How will this affect my ability to use the software going forward? Should I not update the MacOS?
Text from Apple Support Page
About system extensions and macOS
Some system extensions aren’t compatible with current versions of macOS or won’t be compatible with a future version of macOS. Learn what to do if you see an alert about system extensions or kernel extensions.
System extensions work in the background to extend the functionality of your Mac. Some apps install kernel extensions, or kexts—a kind of system extension that works using older methods that aren’t as secure or reliable as modern alternatives. Your Mac identifies these as legacy system extensions.
In 2019, Apple informed developers that macOS Catalina will be the last macOS to fully support legacy system extensions, and we’ve been working with developers to transition their software.