Weaverbird Rhino 6 Issues

Hello guys, I know that this a topic which has emeged many times, but despite trying everything which is mentionned I cannot get W.B into grasshopper in Rhino 6.

The rhino version I am currently using is Rhino 6 SR16 2019-7-9
When opening Yak in my browser I found W.B
I got the definition wb-0.9.0.1-yak-and-mac-install-def, so when I open it in rhino and grasshopper it give me this, which I assume it downloaded it. I have also tried to add it to the grasshopper plug in library in vain.
this is what I get when downloading it.
image

However I got not icon appearing when all is done.
Thank you in advance for your help!!!