# Heat, fans and busy processes

> Why a Mac gets hot and loud: kernel_task, WindowServer, the fans, and the processes that spin them up, from real readings.

Web page: https://trybondi.app/blog/topic/heat/

- [Why is my Mac so hot and loud?](https://trybondi.app/blog/mac-fans-loud/) - Loud fans on a MacBook or any Mac mean the chip is working hard or running hot. Here's how to find what's heating it, and what to do if they won't settle.
- [kernel_task high CPU on Mac? Your Mac is cooling itself down](https://trybondi.app/blog/kernel-task-high-cpu/) - kernel_task at high CPU usually means your Mac is hot, and macOS is slowing apps on purpose to cool it. Here's why it happens and what actually helps.
- [WindowServer using high CPU on Mac: what it means and what helps](https://trybondi.app/blog/windowserver-high-cpu/) - WindowServer draws everything on your Mac's screens. Here's why it gets busy, what normal looks like, and the settings that actually calm it down.

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Bondi is a native macOS system monitor with on-device AI. It tells you why your Mac is slow, in one plain sentence. https://trybondi.app/