Hi there,
If you ever get black objects in the Viewport after using the Transfer Attributes command.
Check this out:
Sometimes (for me at least) Maya automatically turns on the Display Colors Attribute inside the mesh node (Mesh Component Display).
Just turn it off after the transfer.
Now, You are happy,
D
Denes Dankhazi's Blogfolio 
Yes I am happy!! Was looking to solve this problem for days now, read a lot of forums but didn’t work, and this one was the answer. Thanks so much!!
Jesus, this was the problem, not normal maps. Thank you
Cheers
thanks a lot