A Windows application that downloads official macOS installers straight from Apple and creates bootable USB drives to install or reinstall macOS on a Mac.
Everything in a single window — no Terminal, no scripts, no Hackintosh tutorials required.
- Detects your Mac model from its
Model Identifier(About This Mac → System Information) and tells you the latest macOS version that's compatible. - Downloads the official installer from Apple — picking from a full catalog ranging from OS X Lion all the way to macOS Tahoe (the latest).
- Automatically filters versions to those compatible with your Mac, so you don't end up downloading something that won't even install.
- Creates the bootable USB in one click. The drive works directly on the Mac: hold ⌥ Option at startup and pick the installer.
- People with a Mac that has no system, a wiped disk, or a broken macOS install, and need to reinstall.
- People who only have a Windows PC at hand and can't use the traditional Mac method to make a USB.
- People who want to roll back to an older macOS (downgrade) using a freshly built USB.
- People who want to try out betas (Public, Customer Seed, or Developer Beta).
- Open
MacOSHelper.exe. It will ask for administrator permission — that's required because it writes directly to the USB drive. - Click Detect Mac, paste the output of the
system_profilercommand (or just theModel Identifier), and see which macOS version is compatible. - Click Catalog → Load Catalog. Choose between Public Release, Public Beta, Customer Seed, or Developer Beta.
- Pick the macOS version you want and click Download. The download is resumable — if it drops, just resume it.
- Plug in the USB drive (minimum 16 GB) and go back to the main screen.
- Pick the USB in the USB Drive dropdown, pick the downloaded Installer, and click Create Bootable USB.
- Confirm. In a few minutes the USB is ready. Everything on the USB will be wiped.
- Power on the Mac holding the ⌥ Option (Alt) key.
- Pick the macOS installer icon from the boot menu.
- Use Disk Utility to erase and format the disk as APFS (or HFS+ on older Macs).
- Go back and choose Install macOS.
This is a known Apple bug on older recovery environments. Watch the fix here:
- Windows 10 or 11 (64-bit)
- Administrator permission (it's prompted automatically)
- USB drive of 16 GB or larger (all data on it will be wiped)
- Internet connection to download the installer (4–14 GB depending on the version)
Grab the latest build from Releases — it's a single .exe, no installation needed.
- The app does not run on macOS — it's specifically for when you only have Windows around.
- Full bootable USB creation works up to macOS Catalina (10.15). Big Sur and newer (11+) can be downloaded, but USB creation isn't supported for those versions yet. For Apple Silicon Macs, booting from a USB installer isn't supported by Apple itself — use the Mac's built-in Internet Recovery instead.
- Installers are saved in a
Downloads/folder next to the.exe, so you can reuse them without downloading again.