How do I update my pyboard D SF2

[beetlegigg]

I want to put mp 1.20 on my pyboard that is attached to my mac. I can connect to pyboard OK from Thonny and run programs on it. I see it comes up as /dev/tty.usbmodem355A317230372 when I look at the /dev directory from the mac.

I have downloaded dfu-util for the mac but I have not much idea what to do and some googling has just left me boogle eyed. A 'dfu-util -l' does not show any attached DFU capable devices. (and if it did what the heck to do next I wonder, the dfu-util help is a bit sparse on first user info).

So I find a promising python program in the mp repository called pydfu.py But this program, on my mac, complains about the following import files:
import usb.core
import usb.util
These are not to be found, so stymied again.

And pausing in my googling efforts for a while to give the peepers a rest I wonder if a kind soul could impart a few tips on how to upgrade my dear old pyboard, or perhaps a link to a useful document for a beginner with pyboards to follow along could be given. Time for a nice cup of tea :-)

[beetlegigg]

Wonderful what a cup O tea will do. And the answer is follow the instructions on the download page to put the pyboard into mboot mode, then, the useful bit missing from these intructions is to do the following command.
dfu-util -D PYBD-SF2-20230426-v1.20.0.dfu

We are updated 👍