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macUSB

All-in-one bootable USB creator for Mac that flashes macOS, Windows, and Linux installers from local images or a built-in macOS downloader, with legacy Apple Silicon support.

Alternative to: Rufus and balenaEtcher
USB Creator Open Source macOS MIT License System Tools Notarized Cross Platform Images
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About macUSB

macUSB is a guided macOS app for creating bootable USB media on both Apple Silicon and Intel Macs, built to solve the recurring problem of creating installers for macOS Catalina and older on modern Apple Silicon hosts, where codesign failures and manual terminal workflows commonly caused issues. It supports local .dmg, .iso, .cdr, and .app source files, or a built-in downloader that fetches macOS installers directly from Apple's servers, and can calculate SHA-256 checksums for recognized source images. Beyond macOS, macUSB has grown into a broader bootable USB tool, supporting Windows images (Windows 8 and newer, UEFI-only) with optional autounattend.xml setup automation to skip OOBE steps and hardware checks, and Linux .iso images with automatic distribution, version, and architecture detection, validated against 19 different distributions on real hardware. It handles automatic media preparation, partition and format checks, and splits install.wim files exceeding FAT32's 4GB limit using wimlib when needed. The app also includes dedicated support for PowerPC Mac USB boot workflows, such as Mac OS X Tiger and Leopard. macUSB is free, notarized, available via GitHub Releases or Homebrew, localized in 13 languages, and released under the MIT License.

Key Features

  • Bootable USB creation for macOS, Windows, and Linux images
  • Built-in downloader for macOS installers direct from Apple servers
  • Local source support for .dmg, .iso, .cdr, and .app files
  • SHA-256 checksum calculation for recognized source images
  • Automatic legacy macOS compatibility handling on Apple Silicon
  • Automatic partition and format checks with conversion when needed
  • Windows setup automation via autounattend.xml (OOBE skip, hardware check bypass)
  • Automatic install.wim splitting via wimlib for FAT32 compatibility
  • Linux distribution, version, and architecture auto-detection
  • Raw Linux .img writing support
  • PowerPC Mac boot support (Tiger, Leopard) with Open Firmware guide
  • Supports macOS versions from Tiger (10.4) through Tahoe (26)
  • Notarized and code-signed for macOS security
  • Localized in 13 languages
  • Free via GitHub Releases or Homebrew

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