MacOS Serial Number

Apple devices manufactured after 2010 generally have 12-character alphanumeric serial numbers, with the first three digits representing the manufacturing location, the following two indicating the year and week of manufacture, the next three digits providing a unique identifier, and the last four digits representing the model number.

Serial number example: C02L13ECF8J2

3 - Manufacturing locations

Code	Factory
FC	Fountain Colorado, USA
F	Fremont, California, USA
XA, XB, QP, G8	USA
RN	Mexico
CK	Cork, Ireland
VM	Foxconn, Pardubice, Czech Republic
SG, E	Singapore
MB	Malaysia
PT, CY	Korea
EE, QT, UV	Taiwan
FK, F1, F2	Foxconn – Zhengzhou, China
W8	Shanghai China
DL, DM	Foxconn – China
DN	Foxconn, Chengdu, China
YM, 7J	Hon Hai/Foxconn, China
1C, 4H, WQ, F7	China
C0	Tech Com – Quanta Computer Subsidiary, China
C3	Foxxcon, Shenzhen, China
C7	Pentragon, Changhai, China
RM	Refurbished/remanufactured

1 - Year of manufacturing

Code	Release
C	2010/2020 (1st half)
D	2010/2020 (2nd half)
F	2011/2021 (1st half)
G	2011/2021 (2nd half)
H	2012/... (1st half)
J	2012 (2nd half)
K	2013 (1st half)
L	2013 (2nd half)
M	2014 (1st half)
N	2014 (2nd half)
P	2015 (1st half)
Q	2015 (2nd half)
R	2016 (1st half)
S	2016 (2nd half)
T	2017 (1st half)
V	2017 (2nd half)
W	2018 (1st half)
X	2018 (2nd half)
Y	2019 (1st half)
Z	2019 (2nd half)

1 - Week of manufacturing

The fifth character represent the week in which the device was manufactured. There are 28 possible characters in this spot: the digits 1-9 are used to represent the first through ninth weeks, and the characters C through Y, excluding the vowels A, E, I, O, and U, and the letter S, represent the tenth through twenty-seventh weeks. For devices manufactured in the second half of the year, add 26 to the number represented by the fifth character of the serial number. For example, a product with a serial number whose fourth and fifth digits are “JH” was manufactured in the 40th week of 2012.

3 - Uniq Code

The next three digits are an identifier code which serves to differentiate each Apple device of the same model which is manufactured in the same location and during the same week of the same year, ensuring that each device has a different serial number.

4 - Serial number

The last four digits of the serial number represent the product’s model.

Reference

Decode The Meaning Behind Your Apple Serial Number | BeetsBlogBeetsBlog