The update is finally available: https://www.steinberg.net/en/support/downloads/downloads_rnd_portico.html
Thank you for your patience!
Thanks Ed, did a quick test and these seem to work fine on my Mac with OS Sierra! 
Good to know! Finally!
Has this issue been looked into: RND Portico plug-ins issue. - Virtual Effects and Add-ons - Steinberg Forums
And, has it been recognized as an issue or a ‘bug’?
Thanks,
Mauri.