ffmpeg verbos code example

Example 1: ffmpeg segment

ffmpeg -i input.mp4 -map 0 -c copy -f segment -segment_time 1800 -reset_timestamps 1 output_%03d.mp4

Example 2: install ffmpeg mac

There are three options, sorted by complexity:

Homebrew (or other package managers)
Static builds
Compile yourself
To follow this you need to have a bit of knowledge using a terminal/shell under macOS.