alguien podria explicarme brevemente que significa este articulo sobre shell

hola!

me salio este mensaje:

-----------------------

Last login: Thu Dec 5 15:33:45 on ttys000

The default interactive shell is now zsh.

To update your account to use zsh, please run `chsh -s /bin/zsh`.

For more details, please visit https://support.apple.com/kb/HT208050.

MacBook-Pro-de-xxxxxxxxxxxxxx

[Restaurado: 16 ene 2020 20:11:57]

Last login: Thu Jan 16 20:11:57 on ttys000

The default interactive shell is now zsh.

To update your account to use zsh, please run `chsh -s /bin/zsh`.

For more details, please visit https://support.apple.com/kb/HT208050.

MacBook-Pro-dexxxxxxxxxxxxxx

--------------

consulte el link, pero no entendi nada...

gracias