Particle debugger fails to load

[nrobinson2000]

You could be encountering the same error discussed in this thread:

Does Workbench support Mesh Devices?

I’ve seen something similar to this on Linux. There might be a stray openocd process running in the background hogging port 6666. On mac you’ll probably have to run: $ sudo lsof -i tcp:6666 If you find the PID of openocd in the PID column you can kill the process with: $ kill -9 PID

Make sure you are using the appropriate debugger configuration and kill the openocd process using port 6666.