Download Macfax.
Run a free Macfax Basic report in under a minute. Identity, authenticity, spec match. Want full hardware-health verification and the buyer-verifiable binding? Premium is $49 once your Basic report is published.
Notarized by Apple. Read-only. Local.
Every Macfax build is signed with a Developer ID certificate and notarized by Apple before release. Gatekeeper validates it on first launch without prompting for any overrides. The app reads diagnostic data through standard macOS interfaces; it does not modify your system, install kernel extensions, or upload anything beyond the signed payload at publish time.
You can inspect the notarization status with spctl -a -vv /Applications/Macfax.app after install.
About this download.
What does Macfax read from my Mac?
Device identifiers (model, serial, chassis serial, logic-board serial), SMART data, battery cycle count, system_profiler output. On Premium runs it also exercises CPU/GPU/memory for burn-in. Nothing is uploaded during the preview; the signed payload only goes out at publish time.
What macOS versions are supported?
Apple Silicon Macs (M1 or later) on macOS 14 or newer. Intel Macs are not supported; they lack the Secure Enclave primitives the diagnostic relies on.
Will it ask for sensitive permissions?
It uses standard macOS diagnostic interfaces. No kernel extensions, no full-disk access prompt. The first launch asks macOS to confirm an internet-downloaded app, which is normal.
Free to run. Premium when you need it.
The free Basic report covers identity, authenticity, and spec match. Enough for most listings. Upgrade to Premium on the same URL when a buyer asks for hardware-health verification or burn-in data.
See how it works for the cryptographic detail.