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  1. Core Server
  2. SERVER-56728

Cannot run 4.9+ on Apple Silicon

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Details

    • Bug
    • Status: Closed
    • Blocker - P1
    • Resolution: Fixed
    • None
    • 4.9.0-rc1, 5.0.0-rc0
    • Build
    • None
    • Fully Compatible
    • ALL
    • v4.9
    • Dev Platform 2021-05-17

    Description

      Mongo 4.9+ cannot start on M1 laptops:

      % /tmp/mms-automation/test/versions/mongodb-macos-x86_64-4.9.0-rc0/bin/mongod
      zsh: illegal hardware instruction  /tmp/mms-automation/test/versions/mongodb-macos-x86_64-4.9.0-rc0/bin/mongod
      

      acm tracked down that this is because the ISA targeting for the server build was upgraded in 4.9 to sandybridge, which uses AVX instructions that are not handled by Rosetta:
      https://developer.apple.com/documentation/apple-silicon/about-the-rosetta-translation-environment

      Rosetta translates all x86_64 instructions, but it doesn't support the execution of some newer instruction sets and processor features, such as AVX, AVX2, and AVX512 vector instructions.

      He recommended special case downgrading the macOS target ISA to something that doesn’t generate AVX until we have a native Apple Silicon build.

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              andrew.morrow@mongodb.com Andrew Morrow
              louisa.berger@mongodb.com Louisa Berger
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                Updated:
                Resolved: