The only way to compile a .ev3 file to a .rbf file is with the "EV3 Lab" software that is not compatible with macOS 10.15 Catalina.
So your options are:
Run Windows or an older version of macOS in a virtual machine, such as VirtualBox
Find someone that can send you the compiled .rbf file, then use a tool such as ev3duder to transfer the program to the EV3.
It looks like LEGO have indeed completely pulled the previous version.
According to the announcement last year (emphasis added):
Mac Catalina Issues
[…] We have therefore decided to replace the current EV3 Lab software and EV3 Programming App with a completely new app, called LEGO® MINDSTORMS® Education EV3 Classroom. Featuring a coding ...