Download official dmg pictures. Please note that most ISO software cannot recognize this dmg image. This image is a complete package;

2. Download 7z decompression software, unlock this dmg image, and find the largest InstallESD.dmg in it, which is the protagonist of making and installing the U disk;

3. Download the software dmg2img and convert InstallESD.dmg into RAW format. Usage: cmd opens the dos window and the CD enters the folder. Use the command line of dmg2img-i installesd.dmg-oinstallesd.raw for conversion. Note that dmg2img and installesd.dmg are placed in the same directory, otherwise, the path is added to the command line.

4. Use the attached imageWriter software to write the file in the original format to the USB flash drive. Please refer to /read-htm-tid-5097555.html for the above contents. ..

It should be noted that there may be mistakes in writing. It doesn't matter. Format the USB flash drive with FAT32 or exFAT once and try again.

thank you