I am not able to load the externals placed by deken in the folder 

/Applications/Pd-0.47-1-64bit.app/Contents/Resources/extra

when running pd 0.47.1 for mac.

When I try to load such folder from Preferences->Path, pd does not allow

me to select it.

How can I load the externals therein?

Why they are not automatically loaded since they are in /extra/?

Thanks in advance

Best

Angelo