I installed openhab3 manually on an old Mac mini running Debian 10. I want to learn how works for me before I move it to my other machine currently running openhab2. I am having issues with getting my z-wave controller recognized and I am beginning to believe it is an issue with Mac mini/Debian install so I think I will start over on a raspberry pi and see how that goes. I will let you know - so far the backup and restore has me up on the pi.
I ran into the same problem with the z-wave controller on the Raspberry Pi. I solved it with this link -
[SOLVED] OH3: zwave binding Z-Wave Serial Controller Aeotec Z-Stick Gen5 remains offline