There are other threads on this forum about this topic, and the USB (dis)connection issue is not exclusive to Apple. This issue isn't new either! Here is a thread with Windows users: https://forum.fractalaudio.com/threads/usb-disconnecting.146587/Again - it may be an Apple issue, BUT since many of us are locked into that world, we really need the help of Fractal to help us analyze the issue. We need to be able to use our Fractal gear in a relatively seamless manner.
From everything I've read, the common denominator is the Axe III.