Disconnects during big jobs

Newbie! We have done a few projects, but the bigger ones we have issues with lightburn disconnecting and laser machine stopping. LB will say busy. We have replaced the USB cord. I do use a USB port to connect my macbook to the usb cord. What can we do to fix this issue. Thanks!

On those bigger jobs…
Does the laptop go to sleep? If so, it may be the problem.

Hold the Shift key when you click the Send button in LightBurn to, and LightBurn will automatically run the file on the laser when the send is completed. This is useful if you are sending very complex or large files, and want to be certain that the transfer completes before the job starts running, but saves you having to press Start on the controller.