Hi @PTPI, nice to hear that you managed to resolve this issue. Indeed, it’s expected that MacOS cannot right away read the Etcher flashed image as it is a Linux filesystem. From Etcher perspective, it actually sounds like everything is working properly and normally.
Could you elaborate this new issue you posted? Does Etcher show any error when you flash before you need to format USB and the copy a file yourself?
I wouldn’t expect that as Etcher supposed to format the USB drive before the flashing begins. Let us know the error you see. Screenshot of Etcher and copy of Etcher console logs would help (press
Cmd+Alt+I within Etcher to open DevTools and copy paste the error logs you see)