Headphone output noise

Hi everyone, new to the mod community here and just got myself a dwarf a couple of days ago. I’m having some noise issues and I took the time to read the other threads about it but my problem is quite different. So the first couple of days dwarf was fine, I was just getting minimal noise when the usb was plugged to my computer. But since yesterday my headphones output is extremely noisy and seems to stop being when I connect the usb to my imac? I’ve tried most of the solutions mentioned on the other threads.Tomorrow I’ll try it on an amp and see if the same occurs there and let you know but in the meantime does anyone have a clue of what might be going on?