MacBook Overheating: Why It Happens and How to Fix It

Open Activity Monitor (Applications > Utilities > Activity Monitor) and click 'CPU' tab. Sort by CPU%. If any process is using 80–100% CPU unexpectedly, force quit it. Kernel_task at the top is normal — it's macOS throttling heat deliberately.

MacBooks — especially MacBook Air models, which have no fan — are designed to run warm. But there's a difference between 'warm chassis during a video call' (normal) and 'too hot to touch + fans screaming + browser tabs lagging' (a problem). Intel MacBooks (pre-2020) are more prone to overheating than Apple Silicon models (M1, M2, M3, M4), which run significantly cooler and more efficiently.

Open Activity Monitor (Cmd+Space > type 'Activity Monitor'). Click the CPU tab and sort by '% CPU' (click the column header). Any non-system process consistently above 50% CPU is a problem. Common culprits: Google Chrome Helper (Renderer), backupd (Time Machine mid-backup), mds_stores (Spotlight indexing after an OS update), and virus scanners. Force quit the offending process and see if temperatures drop.

Google Chrome is one of the most CPU-intensive applications on macOS. Each tab runs as a separate process. Try closing unnecessary tabs, or switch to Safari — Apple's browser is significantly better optimized for Mac hardware. Also disable unused Chrome extensions, as some run background processes continuously.

MacBooks need airflow underneath. Using one on a bed, pillow, or blanket blocks the ventilation slots and can cause temperatures to spike 10–15°C. Use it on a hard flat surface, or invest in a laptop stand that elevates it and improves airflow. The vents on MacBook Pro are at the rear hinge — make sure that area isn't blocked.

The System Management Controller (SMC) controls fans, thermal management, and power on Intel Macs. Resetting it can fix fans that aren't spinning up properly. For MacBooks with a non-removable battery (2018 and later): shut down > hold Shift+Control+Option and the power button simultaneously for 10 seconds > release all > power on. This doesn't apply to Apple Silicon Macs (M-series).

Apple menu > System Settings > General > Software Update. macOS updates often include fixes for runaway background processes (like mds_stores after a major update) that cause thermal issues.

A degraded battery can cause the MacBook to draw more power, generating extra heat. Apple menu > System Settings > Battery > Battery Health. If it says 'Service Recommended', your battery is degraded. A swollen battery in a MacBook can also cause excessive heat and should be addressed immediately — check for screen warping or an uneven bottom panel as signs.

For older MacBooks, degraded thermal paste between the CPU and heatsink is a real cause of overheating that requires a professional repair. See our [Apple recalls guide](/guides/apple-recall) to check if your model has any active repair programs, and our [how to check if your device is recalled](/guides/how-to-check-if-your-device-is-recalled) guide for steps to verify coverage.