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macOS Troubleshooting Guide

1. Network Issues

  1. Check WiFi/Ethernet connection in menu bar
  2. System Settings → Network → check IP address assigned
  3. Renew DHCP lease via Network settings
  4. Flush DNS cache: sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder

2. App Not Responding

  1. Force Quit (Cmd+Option+Esc)
  2. Check Activity Monitor for high CPU/memory usage
  3. Restart the Mac
  4. Check for app/macOS updates (System Settings → General → Software Update)

3. Slow Startup / Performance

  1. Check Login Items (System Settings → General → Login Items)
  2. Check available storage (System Settings → General → Storage)
  3. Run Disk Utility → First Aid to check disk health

4. Printer Setup

  1. System Settings → Printers & Scanners → Add Printer
  2. Ensure printer drivers are up to date (often auto-detected)
  3. Reset printing system if printer doesn't appear (right-click in printer list)

5. Account / Login Issues

  1. Verify correct Apple ID / local account
  2. Reset password via Apple ID settings or recovery mode
  3. Check FileVault status if disk encryption is involved

Useful Tools

TechAI Assistant