External microphone won't work on Macbook Pro

My external microphone won't work on my Macbook Pro.
My mic is an SE2200 A, and I'm pluggin that into a Behringer Eurorack UB802 (with Phantom power). This is then connected to a 1/4 inch to 3.5mm adapter so I can plug it into my Macbook Pro.
If I plug this directly into my Macbook Pro into the headphone socket (which I've been told doubles up as a mic socket), and go to Settings -> Sound -> Input, the mic does not appear on screen at all.
If I plug it into a 3.5mm to USB adapter, and plug it into a USB port on my mac, then the USB PnP Sound Device appears on the Settings -> Sound -> Input, but no sound is picked up.
Could any suggest why this isn't working?
thanks

You have to use a cable that will break out the 3.5 mm TRRS jack into mic, L, and R.
I haven't found the right wiring yet and the cables I have tried don't seem to work.
See this post: What is the wiring digram on the MacBook Pro 3.5 mm TRRS jack?

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