/ % ls -la /Library/jacktrip/1.3.0/jacktrip
-rwxr-xr-x 1 root wheel 5082024 Jan 24 15:57 /Library/jacktrip/1.3.0/jacktrip
/ % jackd --version
zsh: command not found: jackd
/ % sudo jackd --version
Password:
jackdmp version 1.9.17 tmpdir /tmp protocol 8
/ % sudo jacktrip --version
JackTrip VERSION: 1.3.0
Copyright (c) 2008-2020 Juan-Pablo Caceres, Chris Chafe.
SoundWIRE group at CCRMA, Stanford University
Software was installed with "for all accounts" yes.sudo jackd -dcoreaudio -d"AppleUSBAudioEngine:Focusrite:Scarlett 2i2 USB:Y8RNB4H9B8768B:1,2" -r48000 -p128 &
Again - no joy at all unless I use sudo which I guess should not be required.
FWIW I copied this from the qjackctl generated command.