Are you unable, after updating to Mojave or Catalina to record system audio ? And so that we're clear, I don't mean recording an audio source from an external mic or the mac's internal mic. No. This is any sound that an app may make. Like for instance if you're doing a screen capture of say a youtube video and you want to record the audio as well. THAT audio! You know the sh*t that used to just work with previous systems and versions of Camtasia ? Yeah...THAT!
This seems to be an OS 10.14 problem. It's not a Camtasia issue. Most, if not all system audio recording apps are having the same isssue. And setting the system security to allow Camtasia or any other app the security to do X isn't working either. This is an Apple Mojave and Catalina issue. Something Apple did when they 'updated' the OS broke what used to work.
Oh and if you're thinking, "Hey I remember something about SoundFlower, that open source thing, that used to work!". Yes, it did. 'Used to' is the key phrase. It doesn't anymore. Some people are reporting that their Mojave/Catalina installs are working with Soundflower and they're able to record system audio. Most are not. I'm in that category.
I reported this same audio issue to the good folks at TechSmith via email THREE EFFING WEEKS AGO and I STILL HAVEN'T HEARD A WORD FROM THEM!!!!! I even posted it to the forums. ZIP! NADA! NOTHING!
So in other words, don't hold your effing breath looking for a.) response from TechSmith that solves the problem because it appears that it's a system issue so they're relying on Apple it appears otherwise there'd be a solution by now, no ? and b.) don't expect a response or a solution from apple any time soon. They're too busy counting all the money they just made from their iPhone 11 launch. Lord knows what the eff those people do all effing day long over there. But it's certainly not solving problems like this.