I found some instructions for getting the webcam working on Zorin OS 15.3 on a Macbook Pro mid-2014. The instructions are written for Ubuntu but I followed those instructions to setup the web cam. (see link below) I hope this helps someone else.
ubuntu-20.04-macbook-pro.md
# Ubuntu 20.04 on a 15" Retina MacBook Pro (Mid-2014)
These are notes from my efforts to get Ubuntu 20.04 installed on my older MacBook Pro. I'm making this gist public in the hopes that it's helpful to others.
I did a Minimal install, but selected the option to install additional 3rd-party drivers.
Wifi doesn't work during the install (because it requires a 3rd-party driver), so you won't be able to choose to download updates while installing. No big deal, run a software update after the install.
The installer takes about 25 minutes to complete. Post-install, most things work. The only driver I had to manually install was for the FaceTime camera. More on that below.
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