Installation of extension XML-RPC in Xampp

[mquisuisje]

Hello,
I work on Moodle and Jooma. So that they communicate together, I use joomdle. It requires that the extension XML-RPC is installed in XAMPP. I did not find the solution on the Net.
I work on Mac. Is there a procedure to install this extension on Xampp? And which one?
Thank you for your answer
best regards