the drivers do not install on more recent macOS versions.
you can disable a particular security setting to allow installation, then the device works correct!
in terminal
csrutil enable --without kext
and reboot
to re-enable
crsutil clear
._.
tips were taken from
https://fr.audiofanzine.com/console-fw-usb-mlan/alesis/MultiMix-16-FireWire/forums/t.604946,multimix-16-firewire-support-for-el-capitan,post.8694566.html
https://www.shoutpedia.com/enable-disable-system-integrity-protection-rootless-mac-os/
