Maybe it's in /Users/dstorrs/Library/Racket/bin, or something like this? otherwise, this command shoul hopefully show the file's path if it is on your system:
find / -name protoc-gen-racket -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.

