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.
On a Premium report, 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. (Basic reports skip the binding exposure.)
- 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. On a Premium report, 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.
Free Basic in every listing. Premium when the buyer needs more.
Run Basic by default; it answers "is this Mac what it claims to be" and what the drive and battery report about their own wear. Upgrade to Premium when a buyer asks for burn-in data, or on high-value sales where the case-swap defense matters.
Same download. Same app. Tier chosen after the preview runs.
Get VerifiedFree Basic. Optional Premium. Money-back guarantee.
The free Basic report covers identity, authenticity, spec match, and hardware health. That's enough for most listings. Upgrade to Premium on the same report URL when a buyer asks for burn-in data.