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Setting up a Mastodon development environment using Apple’s container machine on macOS

Container Machine is Apple’s open-source, lightweight virtualization solution for running a Linux development environment on a Mac, akin to WSL (Windows Subsystem for Linux) on Windows. The talk Discover container machines from WWDC 2026 provides an overview of how it works. In my limited experience, it starts and runs much faster than comparable options like Vagrant or Docker Desktop, doesn’t make you deal with janky, non-native UI or nag you to upgrade to a paid plan, and has a smaller memory, CPU, and storage footprint.

First I installed container by running the following in a Terminal window. I used Homebrew but you could also install it manually following the instructions in Apple's README.

brew install container

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This script must be placed in the root folder of the USD tools library provided by Apple on their AR Quick Look Gallery page. Requires assimp to be installed.

Command format: ./stl_to_usdz.sh input_file.stl output_file.usdz

For now, this just inserts the necessary transformations at a hardcoded line number in the USD markup, so compatibility with future versions of usdzconvert is not guaranteed.

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# This file constains the pin mappings for the SeeMeCNC Rostock Max
# (version 2) delta printer from 2015. To use this config, the
# firmware should be compiled for the AVR atmega2560.

# See the example.cfg file for a description of available parameters.

[stepper_a]
step_pin: PC0
dir_pin: !PL1
enable_pin: !PA7

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api.areametrics.com
in.cuebiq.com
et.intake.factual.com
api.factual.com
api.beaconsinspace.com
api.huq.io
m2m-api.inmarket.com
mobileapi.mobiquitynetworks.com
sdk.revealmobile.com
api.safegraph.com

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[
  [
    {
      "p": "CHICKLET",
      "a": 7,
      "f": 7
    },
    "<i class='fa fa-keyboard-o'></i>",
    {
      "f": 4