giuliomoro No, I had the leading / in the command I typed. Nano did not display the leading / in the error message.

what do you get from ls /Volumes/BELABOOT while the board is connected (wait about 1 minute after boot) ? If you get an error, does the Bela IDE still work?

    Can I not just open uEnv.txt in a regular text editor, make the changes, and save it?

    giuliomoro I get the same error message whether I'm using the terminal or IDE. cannot access '/Volumes/BELABOOT' : No such file or directory

    I edit uEnv.txt by opening a terminal on my laptop and connecting to the Bela over SSH. Using either vim /mnt/boot/uEnv.txt ornano /mnt/boot/uEnv.txt you can edit uEnv.txt