For all machine types

• Turn on the computer.

• Click through setup, connect to wifi, etc.

• Full name: Gopher Gopherson

• Account name: gopher

• Password: with an exclamation mark

• Decline as much as possible.

• Set time zone to NY.

• Open a terminal.

• sudo visudo

  Change %admin ALL=(ALL) ALL to %admin ALL=(ALL) NOPASSWD: ALL.

• sudo nvram boot-args="-v"

• Install Go: download the latest tarball from go.dev/dl.

  tar -xf Downloads/go*.darwin-*.tar

  mv go $HOME/goboot

Create $HOME/stage0.sh.

For physical machines

#!/bin/bash

set -x

mkdir -p ~/go/bin;
while true; do
  rm -f ~/go/bin/buildlet
  url="https://storage.googleapis.com/go-builder-data/buildlet.darwin-arm64"
  while ! curl -f -o ~/go/bin/buildlet "$url"; do
      echo
      echo "curl failed to fetch $url"
      echo "Sleeping before retrying..."
      sleep 5
  done
  chmod +x ~/go/bin/buildlet

  mkdir -p /tmp/buildlet
  ~/go/bin/buildlet --coordinator=farmer.golang.org --reverse-type host-darwin-arm64-XX_0 --halt=false --workdir=/tmp/buildlet;
   sleep 2;
done

For QEMU VMs

#!/bin/bash

set -x

export GO_BUILDER_ENV=qemu_vm

mkdir -p ~/go/bin;
while true; do
  rm -f ~/go/bin/buildlet
  url="https://storage.googleapis.com/go-builder-data/buildlet.darwin-arm64"
  while ! curl -f -o ~/go/bin/buildlet "$url"; do
      echo
      echo "curl failed to fetch $url"
      echo "Sleeping before retrying..."
      sleep 5
  done
  chmod +x ~/go/bin/buildlet

  mkdir -p /tmp/buildlet
  ~/go/bin/buildlet --coordinator=farmer.golang.org --reverse-type host-darwin-arm64-XX-aws --halt=true --workdir=/tmp/buildlet;
   sleep 2;
done

chmod +x $HOME/stage0.sh

• Run Automator.
• Create a new Application.
• Add a “run shell script” item with the command: open -a Terminal.app $HOME/stage0.sh
• Save it to the desktop as “run-builder”.

In System Preferences:

• Software Update > Advanced > disable checking for updates
• Desktop & Screensaver > uncheck show screensaver
• Energy Saver > never turn off display, don't automatically sleep, start up after power failure
• Sharing > enable ssh (leave the default administrators setting)
• Users & Groups > Gopher Gopherson > Login Items > add run-builder
• General (before 13: Users & Groups) > Login Options > auto-login Gopher Gopherson
• Network -> Ethernet -> Advanced -> DNS -> Add DNS server -> 8.8.8.8
  • Only necessary on AWS guests, and until https://go.dev/issue/36718 is resolved on all tested releases.

Install XCode:

• Download Xcode from the Apple Developer site: https://stackoverflow.com/questions/10335747/how-to-download-xcode-dmg-or-xip-file. https://developer.apple.com/support/xcode/ is a more authoritative list of versions. (You don‘t want to log in to your account on the machine, so don’t use the App Store.)
• Extract it (xip -x file.xip) and move the resulting Xcode folder to Applications
• run xcode-select: sudo xcode-select --switch /Applications/Xcode.app
• run xcodebuild -version and wait for Xcode to be verified, which will take a long time.
• accept the license: sudo xcodebuild -license accept
• install the command line tools: sudo xcode-select --install
• run xcode-select: sudo xcode-select --switch /Library/Developer/CommandLineTools

Install crypto/x509 test root:

curl -f -o /tmp/test_root.pem "https://storage.googleapis.com/go-builder-data/platform_root_cert.pem"
security add-trusted-cert -d -r trustRoot -p ssl -k /Library/Keychains/System.keychain /tmp/test_root.pem

Put a builder key in the usual spot.