How to properly set the upload port on macOS LPC1768 Board & ULINK-ME

I have no such file in ~/.platformio/packages/
But I have

tool-pioplus/              
tool-pyocd/                
tool-scons/                
tool-unity/                
toolchain-gccarmnoneeabi/

Also, where are those two relative paths at?

I can install OpenOCD via brew.

So I installed OpenOCD via brew install open-ocd
I do not know, if platformIO actually uses it, but yeah.

I executed your command and got this: