@yu_with_a_mission said in M5Burner does not work in MacOX 12.3.: @yopita I tried you way and get another error, "File"/Applications/M5Burner.app/Contents/Resources/packages/tools/serial/tools/list_ports_osx.py", line 32, in <module> kIOMasterPortDefault = ctypes.c_void_p.in_dll(iokit, "kIOMasterPortDefault") ValueError: dlsym(RTLD_DEFAULT, kIOMasterPortDefault): symbol not found ================= Burn Failed =================" How can I solve? System: MacOS Monterey 12.4 Device: M5StickCPlus There is an Issue Montery. Have you installed Xcode from the App Store? Have you instilled the latest Python 3 from the python site? Have you installed the drivers? Have you set the PATH variable correctly? Have you copied the M5Burner V3 to the Applications folder? Have you erased the controller first before writing the correct firmware?