Sell with proof.
Buy with confidence.
A tamper-proof report that replaces the guesswork before money changes hands. Issued by Macfax, open to anyone, impossible to forge.
Free to run · Issues a Macfax report · No account needed
Three steps. One device. One URL prospective buyers can trust before they ever pay.
Drag the .dmg, right-click open. No account, no sign-up. Every check runs locally on your Mac.
Under a minute. Identity, authenticity, spec match. Get a tamper-proof report URL you can drop into a listing.
Hardware health, burn-in, buyer re-verification, for $49. Same report URL, no re-paste needed when you upgrade.
30+ checks across identity, spec, health, and tamper.
The same diagnostic Apple's authorized service providers run, plus sustained burn-in workloads tuned for the buyers who care: ML researchers, devs, and Mac Studio resellers. Every result lands on the report, signed.
Read the full diagnostic stack →Identity
- Serial valid · Apple Coverage
- Activation Lock state
- Find My Mac
- MDM / DEP enrollment
- iCloud account state
Spec match
- Chip variant + cores
- Memory size and type
- Storage size and type
- GPU core count
- Listed-vs-actual
Hardware health · Premium
- SSD wear, hours, writes
- Battery cycles (laptops)
- CPU sustained burn-in
- GPU MLX inference burn
- Memory 30-min memtest
Tamper & integrity
- Logic-board ↔ chassis match
- Service History pane
- Secure Boot / SIP / FileVault
- Fan / thermal anomalies
- Device-bound key · Premium
A PDF report can be re-used on a different device. A Macfax report can't.
The Premium report is bound to a device-specific key fingerprint produced on the seller's Mac. It's not a screenshot a hostile seller can fabricate; it's not a PDF a copy-paste can clone. Sophisticated buyers can re-derive the fingerprint on receipt for an extra doorstep check; the capability is there if they want it.
Macfax | PDF report | Apple Coverage Check | |
|---|---|---|---|
| Verifies the serial is real | |||
| Catches case-swap fraud | |||
| Diagnostic burn-in | |||
| Buyer re-verifies on receipt | |||
| Bound to the certified Mac |
Common questions.
What does Macfax actually check?
Identity (serial, Activation Lock, Find My, iCloud, MDM), spec match (chip, memory, storage, GPU), and tamper integrity (chassis ↔ logic-board, Secure Boot, FileVault). Premium reports also run hardware-health diagnostics: SSD wear, battery cycles, CPU/GPU burn-in, memory test.
How does Macfax prove the report wasn't faked?
Every report is signed at issuance by a key held inside the Secure Enclave of the Mac that produced it. The signature is server-validated; a report that doesn't verify never gets published. The report URL is hosted by Macfax, so what a buyer reads is the canonical record.
How is this different from Apple's Coverage Check or a PDF report?
Apple's Coverage Check tells you whether a serial is real. Nothing about case-swap fraud, hardware health, or whether the device is locked. A PDF can be edited in 30 seconds. Macfax is hosted at a URL, signed at the device, and impossible to forge after the fact.
What's the difference between Basic and Premium?
Basic is free: identity, authenticity, spec match, in under a minute. Premium is $49: adds hardware health, burn-in, photo set, PDF export, and the buyer-verifiable device binding. Same app, same download.
Ready when you are.
Download the macOS app, run a Macfax report, drop the URL into your listing.