Data transfer from S6 to Pixel

[whiteshoez]

I apologize if this has been addressed a million times already, however I just got my Pixel and I am attempting the file/data transfer from my S6 with the quick switch adapter and I keep getting a message that I can't transfer data to the attached, please download android file transfer for Mac.

I have selected "File transfer" on my S6. Not quite sure what the issue is here. Any help is much appreciated.