Tips — Reduce memory usage on your Mac

Find out what's actually using it

Before closing anything, spend thirty seconds seeing what's really going on — it's usually not what you'd guess.

Start with the big picture, not a hunch

Most people assume it's "probably Chrome" or "probably that one app" — sometimes right, often not. Look at what's actually using memory before deciding what to close.

Open Overview — memory grouped by category (Browsers, AI Tools, Developer Tools, and more), heaviest first.

Too many browser tabs, especially media-heavy ones

Browsers are almost always the single biggest category on any Mac. Every tab is its own process; video calls, embedded video, and single-page apps left open for days are the worst offenders. Closing tabs you're not using is usually the single highest-impact thing you can do.

Install the browser extension (in Setup) to see memory by tab/site, not just "Chrome" as one big number.

Apps that quietly launch at login

Apps set to open automatically add up in the background without you ever deciding to open them today. Some are worth it; a lot accumulate over months of "just in case" installs.

Check Who's heavy for anything you didn't realize was running, then remove it from System Settings → General → Login Items.

Chat, AI, and Electron-based apps run heavier than they look

Slack, Discord, ChatGPT's desktop app, VS Code, and similar apps are often full embedded browsers under the hood — a small window can still mean a genuinely large memory footprint.

The AI Tools and Communication categories in Overview surface these directly, instead of them hiding among "everything else."

Background dev tools and services

Docker, local databases, node processes, simulators — these can balloon silently over a long coding session, with no window open to remind you they exist.

Check the Developer Tools category, or watch one specific process climb over time in Live Chart.

A slow leak looks nothing like a big spike

An app that jumps once isn't the same problem as an app that's a little heavier every single day. The second one is worth actually fixing — restarting it, updating it, or replacing it.

Trends's "repeat offenders" list is built exactly for this — chronic weight over days and weeks, not a one-off.

Verify before you act

Closing an app on a hunch, only to find it wasn't the problem, wastes time. Measure instead of guessing.

Isolate one specific action

Curious whether opening that huge spreadsheet, starting a video call, or exporting a project is really what's costing you memory — separate from everything else that happens to be running?

Use Check one action: start, do the thing, stop. It reports the real delta for that specific window, nothing else.

Know when it's actually urgent

"Lots of memory used" and "your Mac is struggling" aren't the same thing — macOS caches aggressively on purpose. What matters is memory pressure, not the raw number.

The floating widget turns red and forces itself open the moment your Mac has 5% or less free — see the pressure guide in Docs for what the levels mean.

General habits that help

Not specific to any tool — just genuinely useful, in order of how much they usually matter.

Quit apps, don't just close their windows. Plenty of Mac apps keep running (and holding memory) after their last window closes — check the Dock for a dot under the icon.
Restart heavy apps occasionally, especially browsers and IDEs left open for days. A slow leak clears on restart even before it's fixed upstream.
Keep apps and macOS updated. Memory leaks are bugs, and bug fixes ship in updates — an old version staying open for weeks is a common, boring cause.
Restart your Mac every so often. Not a fix for a real problem, but it does clear out whatever's accumulated across many days of uptime.

Not sure what's actually running on your Mac right now?

Download Memory Story