> ## Documentation Index
> Fetch the complete documentation index at: https://docs.enlazosystems.com/llms.txt
> Use this file to discover all available pages before exploring further.

# GET /items/{boardID}:{majorVersion}

> Look up the latest release for a specific board ID and major version.

Returns the latest known point release for the given board ID and macOS major version. Unlike [GET /items/](/proximos-api/endpoints/get-boardid-version){boardID}[:](/proximos-api/endpoints/get-boardid-version){version}, this endpoint takes a **major version only** (not a full point release) and returns a concise summary without proximo fields.

## Endpoint

```http theme={null}
GET https://proximosapi.enlazosystems.com/items/{boardID}:{majorVersion}
Authorization: YOUR_DECODED_LICENSE_KEY
```

## Path Parameters

<ParamField path="boardID" type="string" required>
  The Apple board identifier for the Mac model.

  | Era                          | Example board IDs                              |
  | ---------------------------- | ---------------------------------------------- |
  | Apple Silicon                | `J293AP`, `J413AP`, `J316cAP`                  |
  | Intel                        | `Mac-35C5E08120C7EEAF`, `Mac-4B682C642B45593E` |
  | PowerPC Mac OS X (10.0–10.5) | `M5183`, `A1047`, `M8493`, `M6498`, `A1103`    |
  | Classic Mac OS 68k           | `M0001`, `M5119`, `M1476`, `M7777`, `M4300`    |
  | Classic Mac OS PPC           | `M1688`, `M3979`, `M5521`, `M4984`, `M8570`    |

  <Note>
    For Motorola 68k and PowerPC Macs, the board ID is the Apple model number physically printed on the machine. These are verified against EveryMac.com.
  </Note>
</ParamField>

<ParamField path="majorVersion" type="string" required>
  The macOS major version number only — not a full point release.

  | Era                | Format            | Examples                |
  | ------------------ | ----------------- | ----------------------- |
  | Modern macOS (11+) | Single integer    | `14`, `15`, `26`        |
  | Legacy Mac OS X    | Two-part (`10.Y`) | `10.15`, `10.9`, `10.4` |
  | Classic Mac OS     | Two-part (`X.Y`)  | `9.0`, `8.5`, `7.1`     |
</ParamField>

## Example Requests

<CodeGroup>
  ```bash Modern macOS theme={null}
  curl -H "Authorization: YOUR_DECODED_LICENSE_KEY" \
    https://proximosapi.enlazosystems.com/items/J293AP:14
  ```

  ```bash Legacy Mac OS X theme={null}
  curl -H "Authorization: YOUR_DECODED_LICENSE_KEY" \
    https://proximosapi.enlazosystems.com/items/M5183:10.4
  ```

  ```bash Classic Mac OS theme={null}
  curl -H "Authorization: YOUR_DECODED_LICENSE_KEY" \
    https://proximosapi.enlazosystems.com/items/M5521:9.0
  ```
</CodeGroup>

## Responses

### Modern macOS

```json theme={null}
[
  {
    "major_version": "14",
    "board_id_major_version": "J293AP:14",
    "releasedDate": "2026-05-11",
    "version": "14.8.7",
    "resolved_board_id": "J293AP"
  }
]
```

### Legacy Mac OS X

`M5183` covers the Power Mac G3 Blue & White and all G4 PCI/AGP/Gigabit/Digital Audio models. The 867 MHz Digital Audio G4 raises the union max to Mac OS X 10.5.8.

```json theme={null}
[
  {
    "major_version": "10.4",
    "board_id_major_version": "M5183:10.4",
    "releasedDate": "2007-11-14",
    "version": "10.4.11",
    "resolved_board_id": "M5183"
  }
]
```

### Classic Mac OS

`M5521` covers all slot-loading iMac G3 models (350–700 MHz). It supports Classic Mac OS 8.6 through Mac OS 9.2.2 and Mac OS X 10.0 through 10.4.

```json theme={null}
[
  {
    "major_version": 9.0,
    "board_id_major_version": "M5521:9.0",
    "releasedDate": "2000-04-04",
    "version": "9.0.4",
    "resolved_board_id": "M5521"
  }
]
```

## Response Fields

<ResponseField name="major_version" type="string | number">
  The macOS major version from the request. A string for modern macOS and Legacy Mac OS X; a number for Classic Mac OS.
</ResponseField>

<ResponseField name="board_id_major_version" type="string">
  The internal DynamoDB composite key: `{boardID}:{major_version}`.
</ResponseField>

<ResponseField name="releasedDate" type="string">
  Release date of the latest point release for this board/major, in `YYYY-MM-DD` format.
</ResponseField>

<ResponseField name="version" type="string">
  The latest known point release version for this board/major.
</ResponseField>

<ResponseField name="resolved_board_id" type="string">
  The board ID from the request path.
</ResponseField>

## Notes

* If the specified board ID does not support the given major version, a `404` is returned.
* The response is always an array containing one item.
* To also retrieve the next available update from a specific point release, use [GET /items/](/proximos-api/endpoints/get-boardid-version){boardID}[:](/proximos-api/endpoints/get-boardid-version){version} instead.