Hi thanks for your report, I’m on 10.13.6 high Sierra, from my digging around I found one more person this is happening too as well. Also are you using the latest version of live because I installed it on another computer that had LIVE 10.0.5 and it worked, as soon as I updated LIVE to 10.1.5 (Latest release) Icarus still was seen but it was no longer able to be opened which, to me would suggest a compatibility issue with Ableton’s latest version, it also doesn’t show on Ableton’s beta 10.1.9
EDIT: I just read your reply on KVR, so it is the 10.1 onwards that is causing issue with reading Icarus
Iv not run into this issue with any other plug in and I have a lot all regularly updated to latest release some compatible others not yet with Catalina