EMC Numbers Identify Mac Hardware Revision | Generated by AI
Question: What does “EMC” mean in the context of Apple Mac models?
Answer:
EMC = Electro-Magnetic Compatibility — but in Apple’s context it’s used as an internal model identifier number, not a description of electromagnetic properties.
Apple assigns an EMC number to every product they submit for FCC/regulatory certification. It’s essentially Apple’s internal revision code stamped on the bottom of the machine and used in regulatory filings.
Why it matters practically:
The same model name (e.g. “MacBook Pro 13-inch A1708”) can have multiple hardware revisions with different EMC numbers:
| EMC | Year | CPU Generation |
|---|---|---|
| EMC 2978 | Late 2016 | Skylake (i5-6360U) |
| EMC 3164 | Mid 2017 | Kaby Lake (i5-7360U) |
Both are A1708, but different EMC = different internals. When buying parts (battery, screen, keyboard), the EMC number ensures you get the exact right part for your specific revision — even when the outer model number is identical.
Where to find it:
- Printed on the bottom case of the Mac
- Apple menu → About This Mac → System Report → Model Identifier area
- On the original box
TL;DR: EMC is Apple’s regulatory filing revision number, repurposed as a hardware revision tag. When buying replacement parts, match the EMC number to guarantee compatibility.
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