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Speeding Up a Slow Mac Without Reinstalling macOS

Issue Description 

Mac feels sluggish during normal tasks like opening apps or browsing. 

Common Causes 

  • Too many startup apps 
  • Low storage space 
  • Background processes consuming resources 

Step-by-Step Solution 

Step 1: Review Activity Monitor 

  • Open Applications → Utilities → Activity Monitor 
  • Sort by CPU and Memory 
  • Quit apps consuming excessive resources 

 

Step 2: Disable Login Items 

  • Open System Settings → General → Login Items 
  • Remove unnecessary startup apps 

 

Step 3: Free Up Storage 

  • Open System Settings → Storage 
  • Remove large unused files 
  • Empty Trash 

 

Step 4: Reduce Visual Effects 

  • Open Accessibility → Display 
  • Enable Reduce motion and Reduce transparency 

Explore Further 

  • Upgrade to SSD (older Macs) 
  • Add RAM if supported 

Prevention & Best Practices 

Keep at least 20% disk space free.