I don't have an AI. I am going direct from my Axe II to my Mac Mini via USB. Mac Mini (Late 2014) is running High Sierra 10.13. It has a 2.6GHz Intel Core i5, 8 GB 1600 MHz DDR3. I still have 711GB available to answer Ron's question. This weird latency problem only happens with Garageband. I have Pro Tools First and a light version of Ableton and this doesn't happen with either of them. It works great for about five minuets, then starts to do this crazy delay thing. I really like Garageband for its simplicity and great drum tracks. I am not doing any serious recording, I just like to noodle over a click track or drum pattern and lay down guitar rhythm tracks, loop them and solo over them. Just trying to keep it small and simple in my office for the winter. I pulled my Axe out of my live rig, and put it on my desk when I realized I could use it as an interface after dinking around with a Focusrite2i, Garageband and amp plug ins when winter hit and I didn't feel like heating up my practice space in the garage. I don't care how awesome amplitude or anybody els thinks there amp and fx plug ins are they will never hold a candle to the Ax Fx. Jmho. Ha. I have a 3.5 m - RCA cable coming out of the Mac Mini to a Rokit 10" sub with two Rokit 5's on my desktop. Sounds pretty awesome! Nothing like live rig of course, (Axe II, MFC-101, Mesa Simul 292 or Matrix GT 800 power amp into two vintage 69-70 Marshall 4x12 cabs with original G12's in stereo) It's a paint stripper but not to wife and pet friendly. Now that I think about it it never had the problem with the Focusrite 2i but I took it back to Guitar Center when I had the brainiack idea to run my Ax Fx direct to my Mac? Thanks.
Dave