The proof problem in Macs.
A Mac listing is a wall of unverifiable claims: "2023, 32 GB, no issues, never opened." Buyers discount the listing or walk; sellers drop price to compensate. A Macfax report turns those claims into a tamper-proof record any buyer can verify in 30 seconds. That asymmetry shows up in price and time-to-sale.
List your Mac, get it verified: run the free report, attach your listing, and it shows up verified in the Macfax marketplace — in front of buyers filtering for proof.
Verified Macs close faster, for more.
Sample of 47 sold Mac Studio M3 Ultra (512 GB / 4 TB) listings across eBay and Swappa, last 30 days. We surface data, not advice. Sellers can decide what's worth doing.
verified listings sold in 4.1 days median vs 9.8 days for listings without a report
same condition, same model year; verification correlates with the listing holding its ask
messages-per-listing before close, sample n=47
Signed at the source. Verified on receipt.
The seller runs the diagnostic on their Mac and publishes a report URL. The buyer, on the Mac that arrives, re-derives the same device-key fingerprint. If they match, the hardware is the same. If they don't, something changed. This runs on every report.
- Runs full diagnostic
- Signs with Secure Enclave
- Publishes report
- Hardware-attested record
- Open to anyone
- Issued by Macfax
- Re-runs the attestation
- Compares fingerprints
- Confirms · or refuses
The cryptography is doing the work. Neither side trusts the other; both trust Apple's Secure Enclave, and Macfax stores the result. The protocol is open. Anyone can verify a report without us.
What a Macfax report does that screenshots can't.
Can't be screenshotted
Buyers anchor on the real report URL. A screenshot is just an image; without the URL, it doesn't certify anything. The report on macfax.com is the trust anchor.
Can't be replayed
Every report binds to a single Mac's Secure Enclave, and its device-key fingerprint is published. The buyer re-derives that fingerprint on receipt; if the hardware was swapped, the check fails.
Can't be forged
A key held inside the Mac's Secure Enclave signs every report. We don't take anyone's word; not the seller's, not the buyer's, not our own.
There is one report and it is free.
Nothing to choose and nothing to upgrade. It answers whether the Mac is what it claims to be, what the drive and battery report about their own wear, and how the machine performs, then publishes a fingerprint the buyer can re-verify on receipt. Run it on every Mac you list, and re-run it on the same Mac whenever you want a fresher date.
Free. No account, no card.
The report covers identity, authenticity, spec match and hardware health, and publishes a device binding the buyer can re-verify on receipt. Run it on every Mac you list.