I recently purchased an Arduino Nano RP2040 Connect with the hope of running MicroPython (one of the useful side effects of having kids is an excuse to buy stuff for projects). It's worth noting a couple of the issues that came up.
First, there appears to be a known problem with the documented method for copying .uf2 files to a connected board from a Mac running MacOS 13 Ventura. This involves placing the board into boot mode, and simply dropping the .uf2 file into the mounted volume in the Finder. The problem (and the solution that I'll mention below) is documented in the smittytone blog . Actually, the author offers a few possible solutions, but the one I used was to run the command
stty -f /dev/cu.usbmodem1101 1200 Where /dev/cu.usbmodem1101 was the file matching the expected pattern that appeared when the board was connected. After I ran this command, a volume appeared in the Finder, and I was simply able to copy the .u2f file from the command line: