Hi, I try to plug my guitar on my macbook, I dont manage to have any sound come from my headphones on my irig hd2 .I'm using studio one 4 demo, seem to recognise the irig device but no sound.I tried using the aggregate device on my apple midi settings but It doesnt work. The driver suggested on the other topic about irig doesnt exist on mac. is there a solution I dont buy a new audio device if I want later to purchase studio one.Thank you