Why Can't I Install Python 3.7 on My Apple Silicon Mac?

Cannot Install Python 3.7 on osx-arm64

Question:

Why is Python 3.7 unavailable for installation on an Apple Silicon (osx-arm64) Mac?

Answer:

Python 3.7 builds for osx-arm64 were never part of the Conda Forge build matrix, as Python 3.8 had been released when Apple Silicon Macs came to market.

Workaround: Emulation

To use Python 3.7 on osx-arm64, one can:

• Emulate x86_64: Use Rosetta or containerization (e.g., Docker).
• Create osx-64 environments: Use the osx-64 architecture channel and activate the environment before installing packages.
• Use YAML: Set the CONDA_SUBDIR environment variable in the YAML file and after creating the environment.

Note: Mac will automatically run through Rosetta, so no special actions are needed to use emulated environments.

Request for Native Build

Requesting a native Python 3.7 build for osx-arm64 is possible, but it's unlikely to be taken up given the limited use case and the maintenance-only status of Python 3.7.

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