Run a Mac diagnostic. Get a signed report.
Macfax runs a full diagnostic on your Mac and produces a tamper-proof report at a public URL. Useful for selling a Mac, verifying one before you buy, or just keeping a record of your own hardware. Basic is free; Premium adds the burn-in.
Identity, Coverage, lock state, spec match.
Free, signed, public report URL. About a minute to run. Drop the URL into any listing.
- Serial is real and matches Apple's database
- Apple Coverage Check status (AppleCare, Limited Warranty, expired)
- Activation Lock state
- Find My Mac state
- iCloud account binding
- MDM and DEP enrollment
- Spec match: chip, cores, memory, storage, GPU
- Logic-board to chassis serial cross-check
Hardware burn-in, device-bound, buyer re-verifiable.
All of Basic, plus sustained CPU, GPU, and memory load. Bound to one Mac's hardware so a buyer can re-verify on receipt. About 45 minutes, money-back guarantee.
- SSD wear, hours, total bytes written
- Battery cycle count and condition (laptops)
- CPU sustained burn-in
- GPU sustained burn-in (MLX inference workload)
- Memory test (full 30-minute pass)
- Device-bound key fingerprint for buyer re-verification
- Service History pane parsing
- Secure Boot, SIP, FileVault state
Other ways to diagnose a Mac, and what they leave out.
Apple Diagnostics
Checks the hardware. Doesn't produce a shareable record, doesn't verify identity, doesn't show Activation Lock or Find My state, doesn't bind to the device. Useful as a step in a workflow, not as an artifact a buyer can trust.
Apple Coverage Check
Tells you the serial is valid and what AppleCare status it has. Doesn't tell you that the Mac in front of you is the one bearing that serial. Doesn't run a diagnostic. Doesn't check Activation Lock.
Third-party diagnostic tools
Surface useful per-domain data (SSD, battery, system). Output is local-only; not signed, not verifiable by a buyer, not bound to one device. Macfax wraps and verifies a similar feature set into one signed report.
Run a Mac diagnostic in under a minute.
Free Basic on every Mac. Premium adds the burn-in when the listing or the buyer needs it.