How do I add a directory to PATH when using `zsh` in Sierra In macOS Sierra 10.12.x, what is the modern way to add a directory to the PATH environment variable that can work across shells or specifically work with zsh shell (I switched from the default bash to zsh). 

I have seen some Questions and Answers such as this one that are bash-specific. And I have seen some such as this one about launchd but it seems I've read launchd is not the right right in later versions of macOS (not sure). I could find no specific references for Sierra, so I am posting now.

I am trying to install Maven with instructions saying:


  Add the bin directory of the created directory apache-maven-3.3.9 to the PATH environment variable
export

To change the path within your shell session, not system-wide, you can use the bash-style export command with zsh, as documented here. 

The name of the PATH variable is case-sensitive and must be all-uppercase.

export PATH=$PATH:/folder/you/want


To verify your change, run:

echo $PATH


You will see results like this.


  /usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/folder/you/want