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The Proximos API is a simple, read-only HTTP GET API that gives you programmatic access to the complete history of macOS releases — from Classic Mac System 0.97 on the original Mac 128k all the way to the latest macOS releases today. Use it to build custom private workflows around macOS release dates, version history, and compatible hardware identifiers (board IDs).

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What you can look up

  • The latest release for any macOS major version number
  • The latest update available for a specific Mac model (board ID) on a given major version
  • The next available update from a specific version — the version proximo
  • All compatible board IDs for a given macOS version
  • All supported macOS versions for a specific board ID

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Base URL

All requests are HTTPS GET requests to: 
https://proximosapi.enlazosystems.com

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Coverage

Classic Mac OS

System 0.97 – Mac OS 9.2.2Board IDs are returned as processor model names: 68000, 68020, 68030, 68040,601,603 ,603e,604 ,604e,G3 ,G4 ,G5

Mac OS X & macOS

Mac OS X 10.0 – latest macOSPowerPC Macs (10.0–10.5) return PowerPC as the board ID. Intel and Apple Silicon Macs return Apple’s internal board ID strings (e.g. J293AP).

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