Problems with digikam 5.7.0 on MacOSX and external NTFS USB disks

[cp at eeos.biz]

Dear all,

I have some difficulties with digikam 5.7.0 on MacOSX El Capitain.

I have an external NTFS disk that I have connected to my MacBook Pro.  
The disk is accessed through Paragon NTFS. On it there is a large  
archive of RAW and JPG. The disk appear in MacOSX Finder as  
Pictures_1TB.

I have installed digikam 5.7.0 but when I try to add a USB collection,  
Pictures_1TB is not shown.

Anyone who knows how to solve?

Best Regards

Corrado