You can convert a JFIF file to JPG, though the two formats are nearly identical, and most software will open a JFIF file as a JPG. On a Mac, you need to rename the JFIF file extensions to JPG and then ...
Back in 2017, Apple introduced a new default photo format for the iPhone, HEIC (or "high efficiency image container"). I've got nothing against this highly efficient format, since it takes up less ...