A MacBook Air has no fan, so it cannot spin up to cool itself: it conducts heat through its aluminum body and slows the chip when it gets hot. A warm Air is therefore normal during long exports, video calls, games and the first day after an update, but a hot Air at idle is not. Check Activity Monitor for a process using the CPU, take it off soft surfaces such as a bed, unplug accessories and charger for a few minutes, and close heavy apps. If the underside is too hot to touch with nothing running, shut it down and let it cool before restarting.
Differential
Likely causes of “Apple MacBook Air (M2, M3 and M4) runs hot or the fan is loud”, and how to tell them apart
- 1
A heavy task
What separates it Warm during exports, games, video calls or large downloads
How to confirm Let the task finish, then let the Air cool; work on a hard surface
- 2
A runaway app or process
What separates it Hot and slow at idle with one process at the top of Activity Monitor
How to confirm Quit it and update or remove the app
- 3
Indexing after an update
What separates it Warm for a day or two after a restore, a migration or an update
How to confirm Leave it plugged in and idle until it settles
- 4
A soft surface or direct sun
What separates it Gets hot on a duvet, a lap blanket or a sunny window
How to confirm Move it to a hard, flat, shaded surface
- 5
A battery or hardware fault
What separates it Very hot with nothing running, even after a restart
How to confirm Run Apple Diagnostics and contact Apple
Before you touch a setting
Record this first — changing settings destroys the evidence
- What the Air was doing and what Activity Monitor shows
- Where it sits and the room temperature
- Whether charging or an accessory is involved
- Which Air it is, M2, M3 or M4
Try in this order
0 of 5 completedMove it to a hard surface
ReversiblePut the Air on a desk, away from sun and soft furnishings.
Find the process
ReversibleOpen Activity Monitor and quit anything using a lot of CPU.
Unplug accessories and the charger
ReversibleDisconnect hubs and drives and let it cool for a few minutes.
Restart and update
ReversibleRestart and install macOS updates, which include thermal fixes.
Run Apple Diagnostics
ReversibleShut down, hold the power button until startup options appear, then press Command and D.
Model-specific
What is true of this model and not of its siblings
- No fan
- The M2, M3 and M4 Airs have no fan; they throttle the chip under sustained load instead.
- 15-inch models
- The larger 15-inch Air has more surface area to shed heat than the 13-inch model.
- Other models this page answers
- These steps also fit the MacBook Air 15-inch (M3).
Stop boundary
When this stops being a self-service repair
- !If the Air is very hot at idle after a restart, contact Apple
- !If the case bulges or smells of burning, stop and contact Apple
Evidence ledger
Sources behind this answer
Operating range, surfaces, Activity Monitor and third-party temperature apps.
Sensors, normal heavy tasks, blocked vents and the Apple silicon restart step.
Thunderbolt 4, two external displays, 12MP Center Stage camera, adapters and weight.
The 15-inch M4 with six speakers and the same ports and display limits.
Fanless design, one and two external display limits by generation, SSD, memory and the M5 generation.
Exact questions
Common questions
Does a MacBook Air have a fan?+
No. The M2, M3 and M4 Airs are fanless, so they rely on the aluminum case to shed heat and slow the chip when it gets hot.
Is a warm MacBook Air normal?+
Yes during heavy work. It should not stay hot at idle.
Is it bad to use a MacBook Air while it charges?+
No. It is designed for it, but heavy work while charging makes more heat, so give it a hard surface.
Will a cooling pad help an Air?+
A stand that lifts it and lets air reach the base can help a little, though the Air has no fan to work with it.
overheating fan: model differences
Also covered: Apple MacBook Air 13-inch (2018 to 2020).