Setting up a Mac you will travel with
· 6 min read
A Mac that stays on a desk and one that goes in a bag face different problems. The desk machine’s main risk is a failed drive. The travelling machine’s risks are theft, networks you do not control, running out of power, and occasionally being asked to unlock it by someone with authority.
Each has a setting that addresses it, and they are worth doing before the trip rather than during.
Assume it will be stolen
Not likely, and cheap to prepare for.
FileVault on. Without it, the contents of the drive are readable by anyone who takes it. With it, a stolen Mac is a stolen piece of aluminium. Confirm it in System Settings, Privacy & Security. FileVault covers what it does and does not cover.
Find My on, which also enables Activation Lock so the machine cannot be reused. Find My on a Mac covers its actual limits, which are worth knowing before you rely on it.
Require password immediately after sleep. System Settings, Lock Screen. The default delay is short and “immediately” is the right setting for a machine in public.
A Hot Corner for Lock Screen. So locking it when you stand up is reflexive rather than remembered.
Know the serial number, stored somewhere that is not the Mac. It is what a police report needs.
Assume the network is hostile
In practice most public Wi-Fi is fine, and the specific risks are worth handling.
Firewall on. System Settings, Network, Firewall. Costs nothing on a laptop.
Turn off sharing. System Settings, General, Sharing. File sharing, screen sharing and printer sharing should be off on a machine that joins unfamiliar networks.
Set AirDrop to Contacts Only. Receiving from everyone in an airport is how people get sent unpleasant things.
Do not auto-join open networks. System Settings, Wi-Fi, turn off Ask to join hotspots if you find the prompts lead you into networks you did not evaluate.
A VPN is worth it if you have a specific reason, and less essential than it once was now that nearly everything is encrypted in transit. Do you need a VPN on a Mac covers when it genuinely helps. Public Wi-Fi on a Mac covers what the actual risks are in 2026.
Assume you will run out of power
Low Power Mode on battery. System Settings, Battery.
Know your charger situation. Apple’s power adapters handle 100 to 240 volts, so you need a plug adapter rather than a voltage converter. Check the wattage matches the machine; a lower-wattage charger works and charges slowly. Surge protection, power bricks and travelling with a charger covers the detail.
Reduce what runs. Before a long flight, quit what you do not need. Background sync and indexing are the largest avoidable drains.
Download what you will need. Files stored in iCloud with Optimise Mac Storage on may not be local. Open them once while you have connectivity, or right-click and choose Download Now. This catches people out constantly on flights.
Getting a full day of battery out of a MacBook covers the rest.
Border crossings
Worth a short, factual mention because it comes up.
Border officials in many countries can ask you to unlock a device, and the rules differ by country and by your citizenship status. A machine that is powered off requires the password rather than biometrics, which is a meaningful distinction in some jurisdictions.
If you carry client or patient data, or anything subject to professional confidentiality, the practical answer is to not carry it: keep it in a cloud service you can reach after arrival, and travel with a machine that has little on it.
That is a straightforward precaution rather than a dramatic one, and it is the same advice a security team would give.
Before you leave
A short list.
- Back up. A travelling machine is the one most likely to be lost. A backup plan that survives one thing going wrong.
- Update macOS, so you are not doing it on hotel Wi-Fi.
- Download the files you will need offline.
- Confirm FileVault and Find My are on.
- Turn off sharing services.
- Pack the right charger and a plug adapter.
- Note the serial number somewhere separate.
Questions
Should I travel with a different Mac? If you routinely carry sensitive material and cross borders, a machine kept deliberately empty is the cleanest answer. For most people it is unnecessary.
Is airport security a risk to the machine? X-ray scanners do not harm a Mac or its storage. The genuine risk at security is leaving it in a tray, which is common.
Should I use hotel Ethernet instead of Wi-Fi? No meaningful security difference now that traffic is encrypted. Ethernet is often faster and less contended.
What about an AirTag in the bag? Reasonable for the bag. It tells you where a lost bag went; it does not recover a stolen laptop, and Find My already covers the Mac itself.