Find official OS installers, download them fast, and know they are real.
Fast - one file pulled through up to 16 connections at once, spread across the mirrors osloader just timed for you, resuming exactly where it stopped.
Secure - nothing gets its real file name until it matches what the vendor published: an Apple-signed package chain, or the SHA-256 the project signed. A file that fails is quarantined, not handed over.
| OS | Source | What proves the file |
|---|---|---|
| macOS | Apple's Software Update catalog | pkgutil signature, Apple Root CA chain |
| Debian | cdimage.debian.org, ~90 measured mirrors | SHA-256 from the signed SHA256SUMS |
| Ubuntu | releases.ubuntu.com, cdimage.ubuntu.com | SHA-256 from the signed SHA256SUMS |
| Fedora | fedoraproject.org releases.json |
SHA-256 and size published by Fedora |
| Windows | - | registered, not implemented yet |
go build -o osloader ./cmd && ./osloaderosloader # interactive picker
osloader list --os ubuntu --filter arch=amd64 # or drive it from a script
osloader download --os debian --product debian-13.7.0-amd64-netinst.isoPrebuilt binaries for Linux, Windows and macOS are on the releases page - see Installing, which also covers the macOS Gatekeeper prompt.
- Installing - binaries, building, Gatekeeper
- Using osloader - commands, flags, per-OS menus, keys
- How the download works - connections, mirrors, resume
- How a download is verified - what each OS proves
- Adding an operating system - the provider interface
MIT. Contributions welcome.