Help Me Find My Mac

iMac M1 - Upgrade & Repair

Back
Back

iMac M1

Released in 2021 with the 24" iMac M1, this model brought Apple's new ARM based CPU architecture to the iMac line. This initial model is limited to only 16GB of RAM, making it aimed more at the home/office market. Though the new CPU has excellent performance, making it capable of much higher end tasks as long as they have modest RAM requirements.

There are some differences between the low and mid spec model, to the point where they have different Model IDs (the high spec is simply a mid spec with more storage). Most noticeably, the mid spec has more USB ports and an ethernet port, but internally it also has a considerably better cooling system. This makes it a more attractive machine for users who need sustained high performance, since it will avoid the M1's excellent performance being throttled.

Neither RAM or drive is upgradeable after purchase, though they have fast Thunderbolt and USB connectivity that allows extremely quick external storage to be used and this isn't much of an inconvenience in a desktop machine. Models configured with only 8GB of RAM are going to suffer longevity issues however.

Repairability is not great, though there are a few upsides. The screen is glued on, but not especially difficult to remove, and fans, USB ports, headphone jack, power button, speakers, and webcam are all replaceable.

Click on a Mac below to see more details, and fully compatible upgrades and repairs

You can also find your Mac by searching for it:

  • iMac M1 24” 2021

    • iMac M1 “Two Ports” 8 Core CPU / 7 Core GPU 24-Inch (2021)
      • Part Numbers 

        The MPN (Marketing Part Number), also sometimes called the model number, marketing number, order number or part number. This is the part number under which Apple sold this particular Mac model. Only base configurations have part numbers, while Macs sold with various build to order/configure to order options do not have them. What we consider a single Mac may have multiple part numbers, which may refer to different specifications of RAM, drive size, or case colour that were offered as base options. Part numbers also differ by country or region.

        In modern Macs it is usually an 8 or 9 digit code, with the last 2 characters being "/A" or occasionally "/B". The one or two characters immediately before the "/" depend on country or region - "B" is the UK, "LL" the USA, etc. We represent this portion as "xx".

        : MGTF3xx/A, MJV83xx/A, MJV93xx/A, MJVA3xx/A
      • EMC Number 

        EMC numbers cover a narrow group of Macs, or sometimes an individual machine. There are exceptions, but usually models that share an EMC number were released at the same time, and share all attributes apart from minor differences in CPU and other internal components. In a very few cases, Macs of the same model were sold with multiple different EMC numbers.

        The EMC number is usually a 4 digit numerical code, though in a few cases there are additional characters.

        : 3664
      • Model Identifier 

        Model Identifiers often cover a narrow range of Macs. Usually one particular type of Mac, with a specific screen size, released at a particular time. Though in some cases a later revision that is substantially similar, will carry the same Model ID.

        Staring with the Intel Macs released in 2006, Model IDs were in the format MacNameX,Y where MacName is a recognisable Mac model (iMac, MacBookPro etc.), and the X and Y are numbers.

        However in 2022, a couple of years after the ARM switchover, Apple started using the format MacX,Y - the X and Y are numbers, but the "Mac" is the same across different models.

        Old pre-Intel (PowerPC) Macs were almost all PowerMacX,Y or PowerBookX,Y (the exception being the very first iMac, which is: "iMac,1").

        : iMac21,2
      • Model Number 

        Model numbers, also sometimes called family numbers, are an identifier that often cover a fairly wide range of Macs. In cases where the fundamental design of a Mac has remained mostly unchanged, but incremental upgrades have been made to internal components, a single Model Number can cover more than 20 individual Macs, released over several years. Other Model Numbers are unique to a single machine.

        It is usually a 5 character code in the format AXXXX, where the Xs are numerals. Some very old Macs have a Model Number that starts with an "M" rather than "A".

        : A2439
      • Launched: 2021
      • Discontinued: NA (Current Model)
      • Min OS: macOS 11.3 Big Sur
      • Max OS: macOS 12 Monterey (Current)
      iMac M1 “Four Ports” 8 Core CPU / 8 Core GPU 24-Inch (2021)
      • Part Numbers 

        The MPN (Marketing Part Number), also sometimes called the model number, marketing number, order number or part number. This is the part number under which Apple sold this particular Mac model. Only base configurations have part numbers, while Macs sold with various build to order/configure to order options do not have them. What we consider a single Mac may have multiple part numbers, which may refer to different specifications of RAM, drive size, or case colour that were offered as base options. Part numbers also differ by country or region.

        In modern Macs it is usually an 8 or 9 digit code, with the last 2 characters being "/A" or occasionally "/B". The one or two characters immediately before the "/" depend on country or region - "B" is the UK, "LL" the USA, etc. We represent this portion as "xx".

        : MGPC3xx/A, MGPD3xx/A, MGPH3xx/A, MGPJ3xx/A, MGPK3xx/A, MGPL3xx/A, MGPM3xx/A, MGPN3xx/A
      • EMC Number 

        EMC numbers cover a narrow group of Macs, or sometimes an individual machine. There are exceptions, but usually models that share an EMC number were released at the same time, and share all attributes apart from minor differences in CPU and other internal components. In a very few cases, Macs of the same model were sold with multiple different EMC numbers.

        The EMC number is usually a 4 digit numerical code, though in a few cases there are additional characters.

        : 3663
      • Model Identifier 

        Model Identifiers often cover a narrow range of Macs. Usually one particular type of Mac, with a specific screen size, released at a particular time. Though in some cases a later revision that is substantially similar, will carry the same Model ID.

        Staring with the Intel Macs released in 2006, Model IDs were in the format MacNameX,Y where MacName is a recognisable Mac model (iMac, MacBookPro etc.), and the X and Y are numbers.

        However in 2022, a couple of years after the ARM switchover, Apple started using the format MacX,Y - the X and Y are numbers, but the "Mac" is the same across different models.

        Old pre-Intel (PowerPC) Macs were almost all PowerMacX,Y or PowerBookX,Y (the exception being the very first iMac, which is: "iMac,1").

        : iMac21,1
      • Model Number 

        Model numbers, also sometimes called family numbers, are an identifier that often cover a fairly wide range of Macs. In cases where the fundamental design of a Mac has remained mostly unchanged, but incremental upgrades have been made to internal components, a single Model Number can cover more than 20 individual Macs, released over several years. Other Model Numbers are unique to a single machine.

        It is usually a 5 character code in the format AXXXX, where the Xs are numerals. Some very old Macs have a Model Number that starts with an "M" rather than "A".

        : A2438
      • Launched: 2021
      • Discontinued: NA (Current Model)
      • Min OS: macOS 11.3 Big Sur
      • Max OS: macOS 12 Monterey (Current)