You have a developer device named Device1 that runs macOS and has Homebrew installed.

Current GitHub Copilot documentation uses the standalone Copilot CLI installation and authentication flow. On macOS with Homebrew, GitHub documents brew install --cask copilot-cli. For a GitHub Enterprise Cloud account with data residency, the CLI should authenticate directly against the enterprise host by using copilot login --host https://SUBDOMAIN.ghe.com; in this scenario that host is https://contoso.ghe.com. This is important because the Copilot license and authentication context must correspond to the GHE.com account that provides access. The PDF ' s selected commands reflect an older CLI flow and contain OCR or typing errors. For current GitHub Copilot Docs, the verified sequence is the Homebrew cask installation followed by copilot login --host https://contoso.ghe.com.

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