To successfully download and build your own macOS Big Sur ISO for use in the USA, ensure you have:
Open Terminal and run:
softwareupdate --list-full-installers
Find macOS Big Sur (version 11.7.10 or later). Then run: descargar macos big sur iso usa
softwareupdate --fetch-full-installer --full-installer-version 11.7.10
The installer downloads directly from Apple’s US servers to your Applications folder. To successfully download and build your own macOS
sudo dd if=~/Desktop/BigSur.iso of=/dev/disk2 bs=1m
No. Apple distributes only .app installers. You must convert it yourself. Find macOS Big Sur (version 11