Mac Running Slow? 8 Real Fixes That Work

Macs aren't supposed to slow down. That's what we all tell ourselves when we pay double for one. But after a few years of installing software, accumulating files, and dragging your laptop everywhere, even Macs get sluggish.

Here's the real list of what actually helps, with no "Mac cleaner" apps required. (Don't install those. Most are scams that make your Mac slower.)

1. Use Activity Monitor to find the hog

Activity Monitor is Mac's equivalent of Task Manager. It shows you exactly what's using your resources right now.

1. Open Spotlight (Command + Space)
2. Type Activity Monitor, press Enter
3. Click the CPU column header to sort by processor use
4. Then click Memory to sort by RAM use

The thing at the top is your suspect. Common culprits:

• Chrome or Safari with way too many tabs open
• Spotlight (mds, mds_stores, mdworker) reindexing files. Leave it alone, it'll finish
• kernel_task at 200%+. Your Mac is overheating and throttling
• An app stuck consuming memory that you can quit

If a non-essential app is hogging things, quit it. If it won't quit normally, select it in Activity Monitor and click the X button at the top to force-quit.

2. Free up storage space

macOS slows down significantly when free space drops below about 10% of total.

Apple menu > About This Mac > More Info > Storage Settings (or on older macOS, click the Storage tab).

You'll see a breakdown of what's using space. Click Recommendations at the top:

• Store in iCloud: moves large files to iCloud, keeps smaller copies local
• Optimize Storage: removes watched TV shows and movies you already finished
• Empty Trash Automatically: empties Trash after 30 days

Then look at the categories below. Applications, Documents, iOS Files, and Photos are usually the biggest. Click each one to see what you can delete.

3. Empty downloads, trash, and old iPhone backups

These three folders quietly accumulate gigabytes:

• Downloads: Open Finder, click Downloads in the sidebar. Sort by date or size. Delete anything you don't need (most of it).
• Trash: Right-click the Trash icon in the Dock, pick Empty Trash.
• iOS backups: If you've ever backed up an iPhone or iPad to your Mac, those backups can be huge. Find them in Storage Settings > iOS Files. Delete old ones.

4. Reduce login items

Apps that launch every time you log in slow down startup and quietly use resources all day.

System Settings > General > Login Items & Extensions.

You'll see a list of apps launching at login, plus background extensions. Pick anything you don't actively need and click the minus button. Common things you can safely remove: Spotify launcher, Adobe updater, manufacturer "helpers" from headphones or printers, and apps you don't even remember installing.

5. Update macOS

Apple's point updates (12.6, 13.4, etc.) often include big performance improvements. They're free.

System Settings > General > Software Update. Install whatever's pending. Restart when prompted.

6. Reset Spotlight indexing

If your Mac feels constantly busy doing nothing (especially after a macOS update), Spotlight's file index may be stuck. Resetting it usually fixes it.

1. Open Terminal (Command + Space, type "Terminal," press Enter)
2. Type this command exactly: sudo mdutil -E /
3. Press Enter, type your password (it won't show as you type), press Enter again
4. Close Terminal

Spotlight will start reindexing. Your Mac will be slow for an hour or two while it does, then noticeably better.

7. Check battery health (MacBooks)

On a MacBook, a worn battery can cause performance throttling, especially when unplugged.

System Settings > Battery > Battery Health.

If you see "Service Recommended" or the maximum capacity is below 80%, the battery is the issue. Apple's battery replacement runs $129-199 depending on model and dramatically helps performance.

8. Reset NVRAM and SMC (older Intel Macs only)

This is the last-resort fix that often clears weird performance issues. Only works on Intel Macs, not Apple Silicon (M1/M2/M3/M4). Apple Silicon Macs reset these automatically on every restart.

For Intel Macs only:

• Reset NVRAM: Restart, then immediately hold Command + Option + P + R for 20 seconds. Release when you hear the startup sound twice.
• Reset SMC: Different steps for different models. Search Apple's SMC reset guide for your specific Mac.

When it's time to upgrade

Macs generally stay fast for 6-8 years. If yours is older than that and these fixes don't help, you've gotten your money's worth and an upgrade is fair. Apple's trade-in often gives a decent discount on a new one.

About "Mac cleaner" apps

You'll see ads for CleanMyMac, MacKeeper, and similar. Skip them.

• macOS already handles cleanup well via Storage Recommendations
• Many "Mac cleaners" delete files macOS actually needs, breaking things
• Several are flagged as malware or scareware
• MacKeeper specifically has a long history of being labeled malware

If you want one extra cleanup tool, the only one I trust is the free version of Malwarebytes for occasional malware scans.