Issue Description
Mac restarts or shuts down unexpectedly without warning.
Common Causes
- Kernel panics
- Overheating
- Power management faults
Step-by-Step Solution
Step 1: Check Panic Logs
- Finder → Go → Go to Folder
/Library/Logs/DiagnosticReports
- Look for recent panic files
Step 2: Check Temperature
- Open Activity Monitor → CPU
- Quit apps spiking CPU
Step 3: Reset Power Management
- Reset SMC (Intel Macs)
- Apple Silicon: Shut down → wait 30 seconds → restart
Step 4: Run Apple Diagnostics
- Shut down
- Power on → hold D
Explore Further
- Remove recently installed hardware
Prevention & Best Practices
Avoid blocking vents during use.