Splitting a giant CSV to smaller files in macOS

It was an eventful day where i got a request to review a 10 million row CSV. Tried to use excel in mac to open this giant file but excel couldn't even open the file completely:

Excel Alert

So what do i do? Like every sane person would do , i decided to use my python skills to split up the file into chunks to save the manual effort. Then it just flashed on my mind. I am just lazy.