A few years ago, I needed to edit a bootable ISO on my MacBook Air while traveling. I had no internet for a paid license, and UUByte’s trial wouldn’t let me save large files. Instead of hunting for fake keys, I discovered that macOS has built-in ISO tools. I mounted the ISO with a double-click, copied the files, edited the isolinux.cfg inside, and used hdiutil makehybrid in Terminal to create a new bootable ISO — all free. Later, for GUI ease, I switched to the open-source app (for writing) and VeraCrypt (for editing encrypted ISOs). No license needed. That trip taught me: most “ISO editor” paid tools are just wrappers around free command-line utilities.