
Free download unetbootin unetbootin for Mac OS X. UNetbootin allows you to create bootable Live USB drives for Ubuntu, Fedora, and other Linux distributions without burning a CD.
OK, so here we are again with the “Making a bootable disk in Mac” again. I was able to find a workaround for unetbootin on macOS Catalina. Lets get started.
You will need the Finder and the terminal (Terminal, iTerm2, SecureCRT, etc.)
Fist lets open the terminal window
Once you launch the terminal, type sudo and a space.
Now we will open the Applications folder in Finder and find unetbootin
Now lets right-click on unetbootin and choose Show Package Contents (see below)
Choose Contents then MacOS and then drag the unetbootin file onto the terminal screen next to the sudo .
Once you hit enter it will ask you to enter your password you should be good to create bootable USB images now.

I created an executable script to launch it moving forward until they release a supported version.
if you want to make it executable you will need to
Hope this helps