How hot should a Mac get? Normal temperatures, thermal state and good habits

Published 29 September 2026 · psAico

A Mac with Apple silicon runs cool, but it does get hot: during a video export, a build or a game the chip easily passes 80 °C, and a fanless MacBook Air deliberately slows down after a few minutes to cool off. This guide explains which temperatures are normal, what the macOS "thermal state" is, when to worry and what to do to keep your Mac cool. The values are those read by the sensors available to App Store apps, such as Temperatura Monitor.

Which temperatures are normal

Apple publishes no official thresholds for its chips, but experience across M1, M2, M3, M4 and M5 Macs is consistent. Typical values for the chip sensors:

• Idle (desktop, a browser with a few tabs, email): 30–45 °C.
• Normal use (video calls, many tabs, spreadsheets, photos): 45–65 °C.
• Heavy loads (video export, compiling, AI models, games): 80–100 °C and beyond on a MacBook Air, a little less on models with a fan.

The SSD usually sits between 30 and 50 °C and warms up during long copies. The battery sits between 25 and 35 °C and rises a little while charging. A chip at 95 °C under load is not a fault: Apple's chips are designed to work up to these temperatures, and the system itself limits power when needed. The trend matters more than the number: a Mac sitting at 90 °C while idle has something wrong, one that gets there while exporting a video is just doing its job.

Two details about the numbers. App Store apps read the chip's sensors, not the individual CPU cores: the hottest core can be 5–8 °C above the value shown. And the temperature you feel on the case is much lower than the chip's: a MacBook that feels "burning hot" is around 45 °C.

What the thermal state is

Beyond the temperatures, macOS computes an overall verdict, the thermal state, which is the same information the system uses to decide whether to slow down. It has four levels:

1. Normal: all fine.
2. Elevated: the Mac is warmer than usual, but nothing changes for you.
3. Serious: the system reduces performance to contain the heat. Fans, where present, run at full speed; an export or a render may take longer.
4. Critical: a strong reduction of performance, to stay within limits. It is rare and usually short.

From "serious" upwards the Mac is not in danger: it is doing exactly what it was designed to do. But if the thermal state stays serious or critical even when you are not doing anything heavy, it is worth looking for the cause (see below).

MacBook Air has no fan

Since the M1 model, MacBook Air cools its chip with the aluminium chassis alone: no fan, no noise, no vents to keep clean. In exchange, under a heavy and sustained load, after a few minutes the chip reaches its maximum temperature and the system reduces its speed. For an export of a few minutes you will not notice; for an hour-long render, a MacBook Pro with the same chip generation finishes earlier, because its fan lets it keep full speed.

This is normal and does not damage the Mac. If you often run long jobs, it helps to keep the MacBook Air on a hard, cool surface (the heat leaves through the whole bottom) and not on a bed, cushions or blankets.

When to worry

• Serious or critical thermal state while idle, with no heavy apps open. Open Activity Monitor (Applications › Utilities) and sort by "% CPU": often there is a runaway process, a Spotlight or Photos indexing in progress, or a browser tab out of control.
• Fans always at full speed on a MacBook Pro, iMac, Mac mini or Mac Studio, even when idle. Besides processes, check that the vents are not covered or full of dust.
• The Mac slows down or restarts by itself on hot days: use it away from direct sunlight and with air around it.
• The battery is swollen or the bottom of the MacBook has deformed: stop using it and contact Apple support. That is not a software temperature problem.

A Mac also protects itself from ambient heat: above 35 °C of outside temperature Apple advises against using it, and while charging the system may slow or pause charging if the battery is too hot.

Good habits

• Hard, flat surface. A desk, a table, a stand. Never on a bed, a sofa or your lap with a blanket: they block heat dissipation from the bottom and, on models with a fan, the vents.
• Air around it. If it works for a long time, leave room behind and underneath. A tilted stand helps; a cooling pad is not necessary, but on long loads it gains a few degrees.
• Away from the sun and heat sources. A MacBook left in a car in summer or next to a radiator starts out hot.
• Long loads: know what to expect. Exports, builds, AI models and games push the chip to its maximum: that is expected. On a MacBook Air, if time matters, close everything else and let it breathe.
• Charging. Charging while the Mac works at full speed in a warm room adds two sources of heat. If you can, charge before or after the heavy work. The Mac limits charging on its own when the battery is too hot.
• Activity Monitor. Now and then check what is using the CPU: an app eating 100% of a core even when you are not using it heats the Mac and drains the battery.
• Keep macOS up to date. Updates also fix the behaviour of system processes that occasionally heat the Mac.
• Cleaning. On models with a fan, every year or two the vents can be cleaned with low-pressure compressed air, with the Mac off.
• No need to control the fans yourself. macOS manages them well; apps that force them to full speed only make noise and are not allowed on the App Store.

Keep an eye on it

To really know how hot your Mac runs you need the sensors. Temperatura Monitor is a free app for Mac, iPhone and iPad that shows live the temperatures of chip, SSD and battery, the macOS thermal state and a chart of the last 10 minutes, in the menu bar too. On iPhone and iPad you see the same Mac on the same Wi‑Fi network or, with iCloud, away from home as well, and you can be alerted when the Mac runs hot. It collects no data and does not control the fans: it only reads.

Free on the App Store