What you will achieve
Set up a fresh or erased Mac with security, updates, and backups in the right order.
First boot is the cheapest moment to enable encryption, backups, and update channels. Skipping steps here means chasing keychain prompts, full disks, and missing Rosetta weeks later. Work through the list once, in order, before importing old projects or photo libraries.
1) Setup Assistant
- Connect network; sign in with Apple ID or create a local account.
- Enable FileVault when offered, or later under Privacy & Security → FileVault.
- Defer iCloud Desktop/Documents sync until you understand storage impact.
2) Updates first
- System Settings → General → Software Update — install all pending updates.
- Restart and repeat until current.
- Accept Rosetta if prompted when opening an Intel app on Apple Silicon.
3) Security baseline
- Enable two-factor authentication for your Apple ID.
- Turn on Firewall under Privacy & Security if you use public Wi‑Fi.
- Review General → Login Items and remove unknown entries.
4) Backups
- Enable Time Machine to an external drive.
- Review Apple ID → iCloud sync toggles.
5) Daily setup
- Set default browser and mail under Desktop & Dock.
- Run
xcode-select --installif you need developer tools. - Test speakers and microphone in Sound settings.
6) Touch ID and Apple Watch
Enrol fingerprints during Setup or later in Touch ID & Password. Enable Unlock with Apple Watch if you wear one — requires Wi‑Fi on and two-factor authentication on Apple ID. On desktop Macs without Touch ID, use strong account password and consider YubiKey for critical accounts separately.
7) Accessibility and input
Configure trackpad gestures, pointer speed, and keyboard dictation under Accessibility and Keyboard before muscle memory sets wrong. If you use external monitors, arrange displays in Displays → Arrangement so menu bar matches primary workspace.
8) Before you import old data
Resist filling the disk on day one — leave 15% free minimum. If migrating from old Mac, run Migration Assistant only after updates and backups complete. Document serial numbers and proof-of-purchase for AppleCare before wiping old machine.
Verify
Software Update is clear; Time Machine backup has started; core apps launch.
Additional troubleshooting notes
If steps above do not resolve the issue on the first attempt, reboot once, confirm System Settings → General → Software Update is current, and retry with a second administrator account to rule out profile or keychain corruption in your daily user. Document exact error text from Console.app with timestamp — vague “it still fails” without logs wastes support time. On Apple Silicon, re-test after full shutdown (not just restart) because firmware and Thunderbolt controllers reset only on cold boot. Intel Macs should repeat test in Safe Mode to bypass third-party login items. Before erase or keychain reset, verify Time Machine or clone backup completed — batch 3 guides assume Monterey/Ventura/Sonoma/Sequoia paths in System Settings; search Spotlight for renamed panes if your macOS version labels differ slightly.