I have a new I-Mac with the latest operating system, High Sierra (10.12.3). I have Toast #16. I have a new disc recorder, a Mercury Pro purchased from Other World Computing. When I attempt to burn a disc, Toast will recognize the burner for a short time and then revert to the message that no recorder is attached.
A Corel technician suggested that I remove all traces of Toast, restart, and install Toast again. Unfortunately this did not solve the problem and I am still unable to burn a disc. I think perhaps Toast will need to be updated to work properly with OS High Sierra and with this new disc recorder. I would appreciate any comments or suggestions. I wonder if anyone else is having trouble with Toast 16.
I have another disc burner for Blu-ray discs, and that works fine with the computer and Toast 16.