I decided to downgrade Transmission to the default in Maverick due to the fact that the latest version doesn't have built-in support for Proxy. And in this version (2.04) the Helper works and show correctly the download speed of Transmission.
I decided to downgrade Transmission to the default in Maverick due to the fact that the latest version doesn't have built-in support for Proxy. And in this version (2.04) the Helper works and show correctly the download speed of Transmission.