Mac guides

Why your Mac is slow, hot, loud or draining its battery, and how to find the cause in a couple of minutes with the tools already on your Mac.

• Why is my Mac so slow?Most slow Macs come down to one busy app, low memory, a full disk or background indexing. How to find which one in two minutes, and what to do about it.
• Why is my Mac so hot?A hot Mac usually means one app is working the chip hard. How to find it, what's normal, and how to cool your Mac down.
• Why is my Mac fan so loud?Loud fans mean the chip is working hard. How to find the app behind it, when it's normal, and how to get your Mac quiet again.
• What's draining my MacBook battery?macOS doesn't list battery use by app in Settings. How to find the apps draining your MacBook, and the settings that make the battery last longer.
• Task Manager on Mac: how to see and close running appsThe Mac's Task Manager is Activity Monitor, and Ctrl+Alt+Delete is ⌥⌘Esc. How to open both, end a frozen app, and read what's running.

Looking for one process? The Process Library explains 214 of them.