Open ISO files on Mac
To view a compatible ISO on Mac, open it as a disk image in Finder. To browse and copy files without mounting the image, Kernir can read supported ISO 9660 images. Kernir's ISO support is read-only; it does not create or rewrite disk images.
Mount the image in Finder
Try double-clicking the ISO. With the standard disk-image association and a supported image, macOS opens it as a volume that you can browse in Finder. Copy the documents you need to a normal folder, then eject the mounted volume when finished.
If another app handles the double-click, use Open With to choose DiskImageMounter, or open Disk Utility and choose File › Open Disk Image. Apple describes the general process in viewing the contents of a disk image.
Mounting provides a view of the image's filesystem. Copying a document out creates a separate file; changing that copy does not rewrite the ISO you downloaded. Keep the original image if you still need its original layout.
Extract without mounting
The Mac's libarchive-based tar can read supported ISO 9660 images. For Disc.iso in Downloads, list it first:
cd ~/Downloads
tar -tf "Disc.iso"
mkdir "ISO output"
tar -xvf "Disc.iso" -C "ISO output"
Choose an empty destination with a new name. The listing identifies the stored paths; extraction can replace existing matching paths. If the reader reports an unsupported image, do not treat a partial directory as a complete copy.
This workflow extracts files. It does not reproduce a bootable disc, audio tracks or every property of an optical medium. Converting the extracted directory to ZIP is useful for sharing documents, but does not preserve a bootable image as a bootable ZIP.
Browse the image in Kernir
The Mac download is coming soon. You can view the source and build instructions on GitHub. These steps describe the current app workflow.
Choose File › Open… (⌘O) and select the ISO. Browse its folders, select the required files and choose File › Extract… (⌘E). This lets you choose individual entries rather than copying out the entire image.
ISO is read-only in Kernir. Save As can package readable entries into a supported output archive, but cannot modify the ISO or save another ISO. Keep the disc image if your task depends on its structure rather than just the documents inside it.
Understand the limits
An .iso extension is not a guarantee of one readable filesystem. Kernir's current mapping recognizes ISO 9660; it should not be presented as a universal UDF, encrypted-disc or arbitrary disk-image reader. A file that another disk utility can mount may still use features Kernir's archive reader does not support.
Also separate access to files from the ability to run them. Extracting a Windows installer from an ISO does not make it a Mac application. For software installation, follow instructions from the software publisher for your operating system.
If an image will not open, check that its download completed and compare a publisher-provided checksum when available. Changing .iso to .dmg only changes the filename and cannot convert its internal layout.
Kernir.dmg, signed and notarized. Requires macOS 14 or later.
Related guides
App steps were checked against Kernir source code. Command examples were checked with test archives on Linux using libarchive and the named utilities, not in a new macOS session. Updated .
