title: How to merge multiple CSV files into one using terminal on MAC OS?
body: <p>I have the directory with 20 csv files. They all have same headers. I want to merge these csv files into one file. When I'm working on windows, I just open cmd, go to the right directory and use this command:</p>
  
  <pre><code> copy *.csv combined-files.csv
  </code></pre>
  
  <p>It does the job on Windows. I can't run this command on mac's terminal as command doesn't exist on Mac. How do I rewrite this Windows command so it does the same job on Mac OS?</p>