https://devzone.nordicsemi.com/f/nordic-q-a/79454/how-to-achieve-usb-dfu-in-the-mac-osHi, my device need be ota to update fw by usb in mac os, the chip is nrf52840，and i download the nrfutil-mac ,i execute the dfu in the mac os fail，but in the windowns success，the log like this in the mac os. and the step i operate im sure it can been-USTelligent Community 13Thu, 09 Sep 2021 11:19:25 GMThttps://devzone.nordicsemi.com/thread/328782?ContentTypeID=1Thu, 09 Sep 2021 11:19:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:efdb5bc7-c76c-4844-8544-045bd49135f8Vidar Berg<p>Hi,</p> <p>Please try to upgrade your pyserial package and see if that helps. E.g. $ python3 -m pip install -U pyserial</p><div style="clear:both;"></div>