Mach-O viewer
To open a Mach-O file, drop it in the box below. It opens straight away, even with no extension or the wrong one. Your browser opens it on your device: nothing is uploaded.
Open in
Opened on this device, never uploadedDrop or paste another file at any time
What you see
| Mach-O in the viewer | |
|---|---|
| Universal | Each machine named |
| Signature | Signer named from the code signature (not checked) |
| Safety | Read from its headers only: nothing in it is run |
| Extensions | .macho, .dylib, .bundle |
| Upload | None: opened on your device |
What is a Mach-O file?
In short
Mach-O is the program format of macOS and iOS; a universal binary holds several (Intel and Apple silicon) in one file.
The kind of file, machines, platform and minimum version, the libraries it links, its UUID, and who signed it.
How to open a Mach-O file
- Add your Mach-O. Drop the file in the box, choose it or paste it.
- Look at it. The kind of file, machines, platform and minimum version, the libraries it links, its UUID, and who signed it.
- Take it further. Download any file from inside an archive, or open another file.
Questions
Drop the program (inside the .app, under Contents/MacOS) here: its machines are listed, ARM64 for Apple silicon.
Yes. The viewer reads the file’s headers as data; the program never runs. Nothing is uploaded either.
No. The viewer runs in your browser and opens the file on your device. Nothing is sent anywhere.