Don’t know if you found another solution, but you should first download the wch ch340 Mac driver (dmg) and modify the svl.py source code. The artemis boards expect an RTS signal from the USB driver to initiate the bootloader. This is currently not configured in sequoia. If you add ser.rts=False, then ser.rts=True immediately after the serial call in the main function, you can replicate this signal. You can either call svl.py in terminal to program the board or create an executable with pyinstaller. Save this in the correct filepath for the IDE and you should be able to upload code again with no issues.