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Determining Mac Hardware Manufacture Date Using OSQuery

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We use Kolide on our managed Mac fleet for our customers, which has proven to be an incredibly powerful tool. They recently wrote in a blog post how you can use OSQuery to look up the hardware manufacture date of your Macs. It’s pretty cool, check out the article here -

Determining Mac Hardware Manufacture Date Using OSquery

UPDATE -

Here is the actual query that the article ends up with, but I highly recommend reading the whole thing. I think it is extremely interesting.

WITH
serial_partial AS (
  SELECT
    SUBSTR(hardware_serial,4,1) AS char_4,
    SUBSTR(hardware_serial,5,1) AS char_5
  FROM system_info
),
mac_manufacture_year(char_4,year,offset) AS (
VALUES
('C','2020',0),('D','2020',26),('F','2021',0),('G','2021',26),('H','2022',0),('J','2022',26),('K','2013',0),('L','2013',26),('M','2014',0),('N','2014',26),('P','2015',0),('Q','2015',26),('R','2016',0),('S','2016',26),('T','2017',0),('V','2017',26),('W','2018',0),('X','2018',26),('Y','2019',0),('Z','2019',26)
),
mac_manufacture_week(char_5,week) AS (
VALUES
('1',1),('2',2),('3',3),('4',4),('5',5),('6',6),('7',7),('8',8),('9',9),('C',10),('D',11),('F',12),('G',13),('H',14),('J',15),('K',16),('M',17),('N',18),('L',19),('P',20),('Q',21),('R',22),('T',23),('V',24),('W',25),('X',26),('Y',27)
),
merge_data AS (
  SELECT
    year,
    (week + offset) AS week
  FROM serial_partial
  JOIN mac_manufacture_year USING(char_4)
  JOIN mac_manufacture_week USING(char_5)
),
date_modified AS (
  SELECT
    year || '-01-01' AS year_start,
    ('+' || (week * 7) || ' days') AS offset_days
  FROM merge_data
)
SELECT *,
  date(year_start,offset_days) AS manufacture_date
FROM date_modified;
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