Play not working

Hello, I’m on a trial version of Pro 10 and nothing happens when I press on the Play button.
I’ve tried it on my audio montages from a previous version and on new audio files with just a single track but can’t get any playback.
The Play options on the extended taskbar also don’t respond.

Any advice?

Thanks!

Did you verify the audio connection settings?

This also sounds like the issue I have with my Grace m900 USB interface, and a MOTU I had for a short time. In order for them to get along with WaveLab, I had to make an aggregate device in the MacOS settings using the device I wanted to use, and then choose that in WaveLab and then it works OK.