We are using OS X EL Capitan: 10.11.6 with a highend 12core machine.
Boot loader confirmed: 2.01
Main program confirmed: 2.03
Build number :1
The Vyzex kiwi-106 software version 2.03 is sluggish on startup and after a minute of clicking around it locks up and is unresponsive. Through patience we were able to load banks into the synth with the "select-all / Sync Selected per bank, which would take 2-3 minutes and close then restart the Vyzex app as needed.