Mac running slow? How to free up RAM by closing apps
Macs manage memory well, so a full RAM is not always a problem. But when you have many apps open and things slow down, closing what you do not use is the simplest fix. Here is how to check, and what to do.
1. Check memory pressure first
Open Activity Monitor (Applications → Utilities) and click the Memory tab. At the bottom, look at the Memory Pressure graph:
- Green: memory is fine, even if the number used looks high.
- Yellow: memory is getting tight. Closing apps will help.
- Red: your Mac is struggling. Close apps and consider a restart.
The amount of memory "used" alone does not tell you much, because macOS uses free memory for caching on purpose. The pressure graph is the number that matters.
2. Find the heavy apps
In the Memory tab, click the Memory column header to sort by usage. Browsers, video calls, design apps and virtual machines are usual suspects. Quit the ones you do not need right now.
3. Close the apps you forgot about
The apps that cost you most are often the ones you forgot were running. Hold ⌘ Tab to see everything open, or look for the small dots under Dock icons. Quit them with ⌘ Q, or all at once with a Shortcuts action or a tool like Zap.
4. Trim what starts automatically
Open System Settings → General → Login Items & Extensions. Remove apps you do not need at startup, so your Mac starts lighter.
5. Restart now and then
A restart clears memory and stops background processes that crept up. If you rarely restart your Mac, that alone can help.
6. Tame the browser
A browser with dozens of tabs can use more memory than any other app. Close old tabs, use bookmarks or a reading list for "later", and avoid keeping heavy web apps open in the background.
Closing apps frees memory and battery used by apps you are not using. It will not fix a Mac that is simply too old for what you ask of it, but it is the cheapest first step.
Questions
Is high RAM usage on a Mac bad?
Not necessarily. macOS uses spare memory for caching. Look at the Memory Pressure graph in Activity Monitor instead: green is fine, yellow or red means you should close apps.
Does closing apps improve battery life?
It can. Apps running in the background can use CPU and memory. Quitting the ones you do not need reduces that load.
Should I use a 'RAM cleaner' app?
Usually no. macOS manages memory itself. Closing apps you do not need, trimming login items and restarting occasionally is safer and free.