This [issue](https://developer.apple.com/forums/thread/737920) also applies to The PCBUSB-Monitor App that is loading the PCBUSB-Library from `/usr/local/lib` (the default installation folder). In Xcode set linker option `LD_RUNPATH_SEARCH_PATH` to `/usr/local/lib` to solve the issue. See also: https://github.com/mac-can/PCBUSB-Library/issues/17