Mac Running Hot and MacBook Fan Loud: How to Find the Process Behind the Heat
Mac running hot or fans staying loud? Check CPU, GPU, energy use, ventilation, and hardware symptoms to narrow down the cause.
Mac troubleshooting topics
Understand what your Mac is doing. Find the process behind a slowdown, make sense of memory use, and choose the next step with confidence.
What are you investigating?
Choose a topic for a guided reading path through the symptoms, checks, and tools.
CPU, GPU & fan noise
Trace high resource use, heat, and loud fans to the right workload. Start with what you can observe, then follow the relevant process guide.
5 guidesMemory pressure & leaks
A large memory number is only the beginning. Use memory pressure, app behavior, and changes over time to decide what deserves investigation.
5 guidesProcesses & background apps
Find what is running, identify its parent app, and inspect unfamiliar processes before deciding what to close. Compare built-in tools with deeper inspection workflows.
12 guidesStart with these guides
Mac Memory Pressure Red? How to Tell Memory Pressure from a Memory Leak
Learn what macOS memory pressure means, how it differs from a real memory leak, and how to find the app or process causing red memory pressure, swap, and slowdowns.
How to See All Running Processes on Mac
See every running process on your Mac with Activity Monitor or Terminal. Show background processes, find a PID, and check CPU or memory usage.