Bit of a long one but bear with me, lots of setup to what I hope is a simple to solve issue

I have the following setup:

MPD216 Sample Pad Electron Model:Cycles MacBook running Koala Sampler

The M:C is my main clock (Midi over USB) and I route the sound output of the sampler through it as well (audio over USB)

In my live performances I trigger pre programmed sequences and one shot samples which are synced to the M:Cs clock, and so far I've had no issues, it's a bare bones system but it works for what I'm doing

I'm introducing more finger drumming and live sequencing into the project and I need a metronome/click track that I can route to my headphones only i.e through the MacBook built in output rather the main stage output on the M:C

I've searched for as many things as I can think of but can't seem to find the fairly simple piece of software I need.

I don't really want to have to buy a hardware metronome and midisync it through the M:C's midi out if I can avoid it

Is there a way to make koala output it's metronome through a different channel?

Any help massively appreciated