How to Speed Up a Slow Mac

What Causes This?

A “slow Mac” is usually caused by too many apps running at once, low free storage, bloated caches, or too many items launching at startup. Outdated macOS versions, heavy browser usage, and background syncing apps can also use up memory, CPU, and disk activity. Over time, this buildup makes everyday tasks feel laggy even if the Mac hardware is still fine.

Common Symptoms

• Apps take a long time to open or switch between
• The Mac takes too long to start up or shut down
• The spinning beach ball appears often
• Web browsing feels choppy or tabs freeze
• Storage is nearly full and performance drops during basic tasks

How to Fix It Manually

1. Restart your Mac

   • Click the Apple menu in the top-left corner.
   • Select Restart.
   • A restart clears temporary memory issues and stops stuck background processes.

2. Check what’s using CPU and memory in Activity Monitor

   • Open Finder > Applications > Utilities > Activity Monitor.
   • Click the CPU tab and look for apps or processes using a high percentage for long periods.
   • Click the Memory tab and check for apps using large amounts of RAM.
   • If you find an app that is frozen or using excessive resources, select it and click the X button to quit it.

3. Free up storage space

   • Click Apple menu > System Settings > General > Storage.
   • Review the recommendations and remove large files, old downloads, and unused apps.
   • Empty the Trash after deleting files.
   • Try to keep at least 10-20% of your disk free, since a nearly full drive can slow the whole system down.

4. Disable unnecessary login items

   • Go to Apple menu > System Settings > General > Login Items.
   • Look through the list of apps set to open at login.
   • Remove anything you don’t need starting automatically by selecting it and choosing the option to remove it.
   • Also review background items and disable anything nonessential.

5. Clear browser clutter

   • Open your main browser and close tabs you no longer need.
   • Remove extensions you don’t use.
   • Clear cached website data if browsing feels especially slow.
   • If one browser is using a lot of memory in Activity Monitor, quit it and reopen it with fewer tabs.

6. Update macOS and apps

   • Open Apple menu > System Settings > General > Software Update.
   • Install any available macOS updates.
   • Then open the App Store and update installed apps.
   • Performance problems are sometimes caused by bugs that updates fix.

7. Reduce visual overhead if your Mac is older

   • Open Apple menu > System Settings > Accessibility > Display.
   • Turn on Reduce motion and, if available, Reduce transparency.
   • These settings can make older Macs feel more responsive.

Fix It Automatically with Kudu

If you don’t want to hunt through storage, caches, and startup clutter manually, Kudu can scan your system and clean the junk that slows it down. It helps remove unnecessary files, clear buildup, and cut down on background clutter so your Mac feels smoother without all the guesswork.

Download Kudu Free →