Download the archive from https://github.com/DeckerSU/KomodoOcean/releases
Extract the archive, then a terminal window, and use the script to download the z-cash params by typing
cd Downloads/komodo-qt-mac ./fetch-params.sh
Once complete, open komodo-qt-mac
To find out your new address, go to the Receive tab
You can find out your address by clicking the Request payment button.