Hi, recently released a product based on Teensy 4.1 and many customers are having problems to update the firmware (they were all doing it with the last version of the Teensy loader)
looks like the Teensy loader works fine in almost all operating systems with small files, but my .HEX file is 16,3MB , and the loader gets stuck and finally give 'download error' message,
at the moment they all solved trying with different computers with different operating systems, was surprised that one of them has the same operating system as me (macOS sierra) and didn't work.
it would be nice if that can be fixed, thx