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Troubleshooting macOS Update Failures

Issue Description 

macOS updates may fail, freeze, or show installation errors. 

Common Causes 

  • Low disk space 
  • Network interruption 
  • Corrupt update cache 

Step-by-Step Solution 

Step 1: Check Storage 

  • Open System Settings → Storage 
  • Ensure 25–30 GB free 

 

Step 2: Restart and Retry 

  • Restart Mac 
  • Retry update via System Settings → General → Software Update 

 

Step 3: Install Update in Safe Mode 

  • Boot into Safe Mode 
  • Retry update 

 

Step 4: Use Recovery to Reinstall 

  • Boot into Recovery 
  • Choose Reinstall macOS 

Explore Further 

  • Download full installer from App Store 

Prevention & Best Practices 

Avoid updating on unstable Wi-Fi.