Issue Description
Mac boots but never reaches the login screen.
Common Causes
- Corrupt user profile
- Display detection issues
- Startup services failure
Step-by-Step Solution
Step 1: Check Display Output
- Increase brightness
- Disconnect external displays
Step 2: Boot into Safe Mode
- Determines software vs system issue
Step 3: Reset NVRAM (Intel Macs)
- Hold Option + Command + P + R for 20 seconds
Step 4: Create New User in Recovery
- Utilities → Terminal
resetpassword
- Create new admin user and test login
Explore Further
- Reinstall macOS if login services corrupted
Prevention & Best Practices
Avoid abrupt shutdowns.