Hi, Sad news! Just upgraded Mac OS to Sierra from Snow Leopard, then Presonus Firepod that served me right these years doesn't supported anymore (over latest OS). So, I'm looking for a replacement, whether Audio Interface OR USB Mixer! I'm here to seeking your precious suggestions, opinions even advices! These years, I realized that I mostly used 4 inputs from Firepod, and a lot of time processing source (clean recording) over DAW. Now, what's your suggestions to me? Do you think USB will be the best bet? You know what? My very first m-audio mobilepre still serving me right now, what a shame Presonus (I'm sorry). Zoom UAC-8 , Behringer UMC 1820, Tascam US-16x08, Roland Octa-Capture...or any others? What do you say? I might need to proceed to grab one soon. Hope to hear from you very soon! Appreciate!