What you will achieve
Automated Time Machine backups to an external drive or network destination, with encryption chosen deliberately and a restore test completed.
1) Prepare the backup disk
- Use a drive at least 2–3× the data you need to back up (more if you want long history).
- Connect directly via USB/Thunderbolt for reliability — Wi‑Fi backups are convenient but slower.
- Time Machine will offer to erase the disk for Time Machine — confirm no other data is on it.
2) Enable Time Machine
- Open System Settings → General → Time Machine (macOS Ventura and later) or Time Machine in System Preferences on older macOS.
- Click Add Backup Disk and select your drive.
- Choose Encrypt backups if the disk leaves your desk — set a strong password and store it in your password manager.
- Enable automatic backups.
3) Exclusions (optional)
System Settings → Time Machine → Options — exclude huge regenerable caches (virtual machine images, node_modules) if backup size or time is problematic. Do not exclude Documents unless you know why.
4) First backup expectations
The initial backup can take hours over USB and longer over network. Leave the Mac awake and plugged into power. Subsequent backups are incremental.
5) Test a restore
- Open a file you care about, note its contents.
- Enter Time Machine from the menu bar or Spotlight.
- Restore a previous version or deleted file to a test folder.
Verify
Time Machine reports Latest backup with a recent timestamp. Restored test file opens correctly.