Check a Mac Studio serial.
Enter a Mac Studio serial and Macfax returns the exact model and year. Every Mac Studio (2022 and later) uses a randomized serial that encodes nothing, so character decoders can't read it. Macfax returns the model anyway.
95Mac Studio serials identified
Find the serial on a Mac Studio.
- On the chassis: printed on the underside of the enclosure, inside the ring of the rubber foot.
- On any Mac that boots: Apple menu → About This Mac shows the serial.
- Off the machine: the original box carries it on the barcode label, and it appears on the Apple invoice.
- Buying one? Ask for a photo of About This Mac and one of the underside, and check the two serials match.
Check a Mac Studio for a case swap.
- A listing says Mac Studio with M2 Ultra, at a price that looks generous.
- Ask for the serial from the underside and from About This Mac, check they match, and paste it above.
- The result names the model and year. A different year means the listing is wrong.
- In a year that shipped both Max and Ultra chips, confirm the chip in About This Mac and weigh the machine: the Ultra is about two pounds heavier.
Every Apple Silicon Mac Studio
Have a Model ID instead of a serial (from About This Mac or a listing)? This table maps it. The serial lookup above returns the same answer from the serial alone.
| Model ID | Chip | Year |
|---|---|---|
| Mac13,1 | M1 Max | 2022 |
| Mac13,2 | M1 Ultra | 2022 |
| Mac14,13 | M2 Max | 2023 |
| Mac14,14 | M2 Ultra | 2023 |
| Mac16,9 | M4 Max | 2025 |
| Mac15,14 | M3 Ultra | 2025 |
| Mac17,14 | M5 Max | 2026 |
| Mac17,15 | M5 Ultra | 2026 |
What sellers are asking.
Across 431 live asking prices, Mac Studio listings run $1,899 to $4,382, typically $2,900. All configurations pooled; the per-configuration pages below carry the tighter bands.
What goes wrong with used Mac Studio deals.
Case-swap fraud targets the Studio specifically: a Max board in an Ultra-labeled case. The Ultra weighs about two pounds more. Weigh it, and check the serial resolves to the model on the label.
The 2025 line pairs an M4 Max with an M3 Ultra, and the higher number is not automatically the faster machine for your workload. The serial says which one is actually in the box.
Questions about Mac Studio serials
Does the serial show whether a Mac Studio has a Max or an Ultra chip?
Not always. The result names the model and year, and the table above lists which chips each year shipped with. In a year with both, confirm the chip in About This Mac and weigh the machine: the Ultra is about two pounds heavier.
Where is the serial number on a Mac Studio?
Printed on the underside of the enclosure, inside the ring of the rubber foot, and listed in About This Mac.
Does a Mac Studio serial say how much memory or storage it has?
No. The serial pins the model and year; memory, storage and the exact chip are not part of it. About This Mac on the machine shows all three, so read them from there before you pay.
Buying or selling a Mac Studio?
A serial names the model. A Macfax report proves the Mac in front of you is really that machine, in the condition claimed, hardware-signed and verifiable online.