OpenDMG
macUSB icon

macUSB for Mac

A bootable macOS / OS X installer creator for Apple Silicon Macs.

By Kruszoneq. Free and open source, MIT licence.

Get it with OpenDMG View source on GitHub

macUSB at a glance

Version
2.5
Released
20 September 2026
Download size
34 MB
Works on
Apple silicon and Intel
Licence
MIT
Category
Utilities
Developer
Kruszoneq
GitHub stars
3.2K

About macUSB

The all-in-one bootable USB creator for Mac

Screenshots

macUSB screenshot 1macUSB screenshot 2macUSB screenshot 3macUSB screenshot 4

How to install macUSB on a Mac

  1. Get OpenDMG. It is a free app store for open source Mac apps. Download OpenDMG.
  2. Search for macUSB and press Get. OpenDMG downloads version 2.5 from Kruszoneq's own GitHub release.
  3. Open it. The download is checked against its SHA-256 fingerprint and its signature is checked on your Mac before it lands in Applications.

Updates to macUSB show up in OpenDMG and install with one button. No account is needed.

Prefer to do it by hand? The developer's file is on GitHub: macUSB.2.5.dmg (34 MB).

What is new in macUSB 2.5

macUSB v2.5 expands installer media creation with support for writing raw disk images and exporting downloaded macOS installers as DMG files. This update also improves USB target selection, downloader behavior, protection of active operations, the background helper lifecycle, and the app’s overall visual consistency.

### ADDED

- Added the ability to write raw `.iso` and `.img` images to external drives using **Tools → Write a Raw Image to a Drive…**.
- Added the ability to save downloaded macOS installers as `.dmg` disk images.
- Added the **Option (⌥) + L** keyboard shortcut for exporting diagnostic logs.

### CHANGES

- Replaced manual recognition of unrecognized `.iso` files as Linux images with the raw image writing feature.
- The app language can now be changed only before file analysis begins or before the downloader is opened.
- Updated the generic Linux icon to make it visually consistent with the individual distribution icons.
- After recognizing a macOS or Mac OS X installer, the target list now displays entire physical USB drives.
- For OS X Yosemite and newer installers, holding **Option (⌥)** while selecting a target reveals compatible GPT/HFS+ volumes that can be used without reformatting the entire drive.

### FIXED

- Fixed Windows installer media creation when another connected volume had the same name as the selected target.
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