leighelse wrote:I bought my 2018 Mac Mini three months ago, blissfully unaware of the USB audio issue. I spent a packet on it, including 64GB RAM.
Thankfully MacOS 10.14.4 was released about the time I received my unit, and I had few issues apart from it periodically dropping a USB3 hub that connected my MIDI control surfaces and instruments. This was frustrating, but appeared to be resolved when I changed the connection from a Thunderbolt adaptor to a direct connection via one of the Mac Mini's two USB-A ports.
However last weekend I updated to MacOS 10.14.5, after which I had extensive audio drop-outs even playing a .wav file in iTunes. It's taken quite a while to diagnose the cause; it's that same USB3 hub, a powered MBeat Superspeed with seven ports.
For now I've plugged the USB hub back into a Thunderbolt port, but I'm sure I'll have to replace it, which is a shame; a decent Thunderbolt 3 hub is about EUR300 (NZD500 where I live).
USB hubs can be a real pain, even powered ones. I was almost at the stage of returning my Ableton Push 2 as faulty, after using it without problems for over a year when it then started not connecting, spent ages even reformatting the computer and re-installing everything, only for the problem to be cured by plugging it directly into the back of the Mac Mini.
The worry is that as USB ports reduce in quantity with various hardware releases, hubs will always be required for the foreseeable. I have four external USB drives, a synth, two MIDI keyboards and a memory card reader all connected via two hubs currently.