Issue Description
Major macOS upgrades can cause issues if preparation steps are skipped.
Common Causes
- Incompatible apps
- Low disk space
- No backups
Step-by-Step Solution
Step 1: Check Compatibility
- Verify Mac model supports new macOS
Step 2: Back Up System
- Create full Time Machine backup
Step 3: Free Up Disk Space
- Ensure 30–40 GB free
Step 4: Update Apps First
- Install app updates before upgrading macOS
Step 5: Install macOS Upgrade
- System Settings → Software Update
- Install and allow process to complete
Explore Further
- Delay upgrade if critical apps unsupported
Prevention & Best Practices
Never upgrade macOS without a verified backup.