How to Fix a Mac Running Hot

Fix your overheating Mac with proven cooling solutions. Check Activity Monitor, reset SMC, clean vents, and optimize performance settings.

1. Check Activity Monitor for CPU-intensive processes. Press Command + Space, type Activity Monitor, and press Enter. Click the CPU tab and sort by % CPU. Look for processes consuming over 50% CPU consistently. Select problematic processes and click the X button to quit them. Chrome, video editing apps, and runaway background processes are common culprits.
2. Reset the System Management Controller (SMC). Shut down your Mac completely. For MacBooks with removable batteries, remove the battery for 15 seconds. For newer MacBooks, press and hold Shift + Control + Option + Power for 10 seconds. For desktop Macs, unplug the power cord for 15 seconds. Restart your Mac and check if temperatures improve.
3. Clean the air vents and internal components. Power down and unplug your Mac. Use compressed air to blow dust from the vents, keyboard, and ports. For desktop Macs, remove the side panel and blow out dust from fans and heat sinks. Never use a vacuum cleaner as it can generate static electricity. Work in short bursts to prevent moisture buildup.
4. Check and adjust Graphics settings. Go to System Preferences > Energy Saver (or Battery on macOS Big Sur and later). Uncheck "Automatic graphics switching" if present. This forces your MacBook to use integrated graphics instead of the power-hungry discrete GPU. For intense tasks, manually switch to high-performance mode only when needed.
5. Reduce background visual effects. Navigate to System Preferences > Accessibility > Display. Check "Reduce motion" and "Reduce transparency." Go to System Preferences > Dock & Menu Bar and uncheck "Magnification." These changes reduce GPU load and heat generation during normal use.
6. Monitor temperatures with built-in diagnostics. Hold the D key while starting your Mac to run Apple Diagnostics. This will test your thermal sensors and cooling system. Note any error codes that appear. You can also hold Option while clicking the Apple menu to access system information and check fan speeds under Hardware.
7. Improve airflow around your Mac. Elevate your MacBook using a laptop stand to improve air circulation underneath. Ensure desktop Macs have at least 6 inches of clearance around air vents. Remove any objects blocking airflow. Use your Mac on hard, flat surfaces rather than beds, couches, or other soft materials that block vents.