What does it mean if my MacBook Pro serial number starts with "K"?

I review products for amazon and the items being offered are for MacBooks either the serial numbers starting with "A", and mine starts with a "K" and I can't seem to figure out why. Im sure it's simple but Im not seeing a straight answer from the internet. None that I trust anyway.


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Original Title: My MacBook Pro serial number starts with K

Posted on Aug 1, 2025 2:04 PM

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Posted on Aug 2, 2025 9:56 AM

What does it mean if my MacBook Pro serial number starts with "K"?


It means the serial number starts with a K.


Apple has used a randomly-generated serial number for recently-manufactured products; from 2021 onward.


While the randomly-generated serial numbers have a defined length, they include no (discernible?) fields.

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Aug 2, 2025 9:56 AM in response to fplblack24

What does it mean if my MacBook Pro serial number starts with "K"?


It means the serial number starts with a K.


Apple has used a randomly-generated serial number for recently-manufactured products; from 2021 onward.


While the randomly-generated serial numbers have a defined length, they include no (discernible?) fields.

Aug 2, 2025 12:19 PM in response to fplblack24

fplblack24 wrote:

What does it mean if my MacBook Pro serial number starts with "K"?

That explains it for me thank you very much.


?


Thought you were asking about MacBook Pro....???


by Allen Jones— "The only place where the first letter appears to have any significance is in iPads, iPhones, and later Apple TVs"


by MrHoffman—this seems more applicable

"Apple has used a randomly-generated serial number for recently-manufactured products; from 2021 onward."

Aug 2, 2025 9:47 AM in response to fplblack24

My M4 Pro Macbook Pro I web-ordered with storage and power upgrades from the U.S. Apple online store in March has an "L" serial number.


Long ago, Apple used the first two letters of the serial number to show the factory where it was assembled. As far as I can tell, that pattern is long obsolete.


The only place where the first letter appears to have any significance is in iPads, iPhones, and later Apple TVs. There is a "order number" in this rough format — XX000XX/X where "X" represents letter and "0" represents digits—that shows options and localizations. The first letter options is M, F, P, or N.


— If the order number starts with M, it was purchased new from Apple or a major carrier.


— If the order number starts with F, it was refurbished by Apple or a carrier.


— If the order number starts with P, it was sold as a personalized device with Apple engraving.


— If the order number starts with N, Apple provided it as a replacement device for a device returned for service


I sent my older iPad in for a battery service about four years ago and, as usual, they quickly sent a refurbed replacement of exactly the same specs with a new battery and new outer shell. It's order number:



That shows after tapping the model number in Settings on iPhones and iPads.


Aug 1, 2025 3:24 PM in response to fplblack24

fplblack24 wrote:

I review products for amazon and the items being offered are for MacBooks either the serial numbers starting with "A", and mine starts with a "K" and I can't seem to figure out why. Im sure it's simple but Im not seeing a straight answer from the internet. None that I trust anyway.


So what is the issue exactly...?


Check Device Coverage—enter the serial number

View Coverage - AppleCare & Warranty


Serial number is quite different then a product numbesr/model numbers...especially over seas.(?)

third party resellers/ different Country's will assign there "own" product/model numbers — variations in color is one, variations in screen type, it goes on and on...


If in doubt buy direct https://www.apple.com/mac/


I can not answer for Amazon.

Aug 1, 2025 9:10 PM in response to fplblack24

fplblack24 wrote:

I review products for amazon and the items being offered are for MacBooks either the serial numbers starting with "A", and mine starts with a "K" and I can't seem to figure out why. Im sure it's simple but Im not seeing a straight answer from the internet. None that I trust anyway.

My MacBook Pro serial number starts with a "C." I would not worry about the first letter in the serial number.

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What does it mean if my MacBook Pro serial number starts with "K"?

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