On a new MacBook Pro I get Hamlib error: Communication bus error while getting current frequency. Last summer on 5 year old Macbook Pro with the same configuration, I was able to complete a number of QSOs. I have tried a number of Radio settings. I am using the CE-19 with a cable and a separate Y audio cable connected to a USB External Sound Card, VANDESAIL USB2.0. Is anyone successfullu using a similar configuration?