Why your Mac is slow, and what actually helps

Why is my Mac slow? The real causes, and how to check each

A slow Mac almost always has a specific cause: memory pressure, a full disk, an app running under Rosetta, a runaway process or heat. Here's how to find yours.

What memory pressure means on a Mac, and why free RAM doesn't matter

macOS keeps RAM full on purpose. Memory pressure, not free memory, tells you whether your Mac is short of it. Here's how to read it.

How to check your MacBook's battery health

Where macOS shows your battery's maximum capacity, cycle count and condition, what 80% and "Service Recommended" mean, and when a replacement is worth it.

How to check your Mac's SSD health and wear

System Information only says "Verified". Here's how to see how much of your SSD's rated life is used, and why swapping wears it faster.

Is it safe to delete Xcode's DerivedData?

Yes. DerivedData is rebuilt the next time you build. Here's what it holds, what else in Xcode's folders is safe to clear, and what isn't.

How to find and delete old node_modules folders on a Mac

node_modules folders in projects you've moved on from can add up to many gigabytes. Here's how to find them, how much they take, and how to remove them safely.

kernel_task using a lot of CPU on your Mac? Here's what it means

kernel_task's high CPU use is macOS keeping your Mac cool, not a bug. Here's why it happens and what actually brings it down.

Do Mac RAM cleaners actually work?

They make a number go up for a minute. Here's what memory cleaners really do on macOS, why it doesn't last, and what helps instead.