.iso - Disk Images
Normally you can get to the contents of an ISO file by double clicking it. It will show up in Finder just as if you put a CD in your Mac. For that case you do not need File Juicer.
When File Juicer Is Useful for ISO Files
Damaged ISO files
If the ISO file has been damaged or the filesystem header is corrupted, Finder will refuse to mount it. File Juicer scans the file byte by byte regardless of the filesystem structure, and can recover images, audio, video and documents that are still intact inside.
Disc formats macOS cannot mount
Some disc images use filesystem formats that macOS does not support — certain UDF variants, old Amiga disc formats, or proprietary game disc layouts. File Juicer's content-based scanning does not depend on the filesystem, so it can still find and extract recognisable file types.
Old game disc images
CD-ROM games from the 1990s often stored audio tracks, video (FMV), and images directly on the disc in standard formats like JPEG, WAV, or MOV. File Juicer can extract those without needing to understand the game's internal structure.
Extracting specific file types from a large ISO
If you have a large ISO — such as a Linux install disc — and you only want specific content like wallpapers or icons, File Juicer can extract just those file types directly without mounting and browsing the whole disc.
Creating an ISO from a folder
To create an ISO disk image "mymix.iso" for a folder "MyMix" you can use the Terminal application and type this command:
hdiutil makehybrid -o ~/Desktop/mymix.iso ~/Desktop/MyMix
You can burn the resulting .ISO to a CD with Disk Utility.
Wikipedia article: ISO 9660