I looked through the other forums, but couldn’t find a clear answer. I just updated both my Mac and LightBurn. I know have the 1.4.03 LightBurn software and my Mac is Sonoma 14.5
I’m attaching an image, but this computer with the older software worked fine with LightBurn. With the new software, I get booted out of LightBurn and the laser won’t connect.
It’s trying to connect to my bluetooth headphones? And the other ports always say Waiting for connection or Port already in use.
It’s incredibly frustrating and I don’t know how to fix it. Any help would be greatly appreaciated!
When you originally installed, did you get the USB to serial kernel extension? At least since Mojave, the Mac has had native support for the CH340 USB to serial chip. The latest releases of the Mac OS use a different way of doing kernel extensions and the one you installed previously may have a conflict. I suggest uninstalling that extension and see if you can connect after that. It’s working fine for me without the external kernel extension. I don’t know if your laser uses the CH340 chip, but, if it does, this may be the cause.
There have been multiple versions of the kernel extension to support the CH340 devices. However, if your laser doesn’t use one of those devices, my advice above isn’t relevant.
You need to look in both /System/Library/Extensions and /Library/Extensions for one of the below:
osx-ch341-kext
usbserial.kext
ch34xsigned.kext
If you find any of them, you can remove them by going into a terminal session, navigate to where you found it and issue one of the below commnds, depending on which, if any, you found:
sudo kextunload ./osx-ch341.kext
sudo rm -rf osx-ch341.kext
Are you using an Apple Silicon Mac or an Intel Mac? Mine is an Apple Silicon; I have another Intel Mac which I haven’t tried to connect, yet. I’ll see if I can try it tomorrow and let you know. If you are using Apple Silicon, you might try to reinstall the OS (won’t affect your user data, only the OS); it should reinsall anything that is missing.
I did check this morning. I can connect and run my laser using either Intel or Apple Silicon (M1) with no issues. Neither has a third-party kernel extension installed. The Intel one is running the latest supported by that machine, Monterey, while the M1 is running the latest Sonoma OS.
Check with the manufacturer of your laser to see what speed they want. Mine uses 250,000.
Hey! So I ended up fixing it by installing a CH34 extension on my computer. Unfortunately, I had to get a new computer for unrelated reasons and am having the same problem where my laser won’t connect. The new computer is a M3/Apple Silicon. I tried downloading the other thing that worked last time, but it didn’t make a difference. I also tried looking for the extensions you mentioned previously, and I couldn’t find any of them in my system. Should I uninstall the extension I downloaded? Or change the speed?
The baud rate? Its 921,600, but I’m not sure how that will help my laser cutter connect. It’s currently not giving an option other than cu.usb and cu.Bluetooth to connect the device. Neither of those work unfortunately. They both just say waiting for connection
