Hi guys. I booted Pop!_OS up from a USB on my Apple iMac 18,3 (late 2017, 27-inch). Everything’s working great except the speakers; I tried installing pavucontrol but even it seemed to work fine; there was just no audio coming out. Not sure if I need to install special drivers for the iMac built in speakers; when I looked this up I couldn’t find any such drivers. Any idea what I might be able to do to fix this? Thanks in advance!