New Downloader won't connect on MACOS Catalina

  • Hi All.
    I am running latest Arduino IDE and Catalina. My first Downloader with CP2104 chip works fine with my Stamp-PICO.
    My new Downloader with CH9102F chip does not work with my Stamp-PICO.
    It appears in the Tools, Port as /dev/cu.usbmodem, but the usual usb appears as /dev/cu.usbserial.
    It runs ok on a old Win10 PC Laptop, but not on my main iMac.
    I get this error(s)
    A fatal error occurred: Failed to write to target RAM (result was 01070000)
    A fatal error occurred: Failed to write to target RAM (result was 01070000)
    M5Stamp tech support sent me a CH34x driver but it would not install because of " OSSystemExtensionErrorDomain error 9 "
    While I can still program my stamps with the original Downloader, I would like to get the new one running on iMac!!!
    I am afraid that new M5Stack products, going forward will not run on iMac!
    Thanks in Advance.

  • try to install the driver?


  • Hi,
    I'm experiencing the exact same issue here. When I try to install the driver you are suggesting I receive the following error:

    I'm running Mac osx with Catalina 10.15.7
    My downloader kit was sold through Distrilec and has serial number K051B21080100053.

    Any suggestion?

  • CH34X driver for the CP2102/CH910?
    I'm using the the CP210x driver and have it working