@tomasraposo It looks as though it could be 64 - 32 bit incompatible after a cursory look.
I am not using OSX and someone else will get involved in your post I am sure.
Reading through the website link it suggests...... by the order of the OSX versions, that he was using Vanilla 0.47 (32-bit) for High Sierra.
There seems to be only one executable...... shape..... in the ussstools folder.
Everything else is abstractions.
If objects are not found (cannot be created) it could just be that you need to point to their path by opening Pd preferences and adding the paths from root (C:/...?) to the "usss" folders.
He mentions "falling back" to Pd-extended", which although unsupported, was the last version of Pd to work "out of the box".
You might just need to fall back to Vanilla 0.48 (32-bit) but you would still need to add the paths so that Pd finds what it needs.
I cannot find his detailed installation instructions (yet)...... but some mention of needing to run "blue" for projects....... whatever that means.