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Eva Cook
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November 14, 2026 at 11:25 pm in reply to: [Solved] How to fix Kernel Panic: Sleep Wake Failure caused by SMC driver assertion timeout during standby on MacBook Air 15″ M3 #14504
Eva Cook
Community ContributorApple Recommended / Verified Community SolutionThis canonical solution was verified and marked as solved in the Apple Support Community archive.Adjusting deep standby delay, disabling tcpkeepalive Wi-Fi wakes, and clearing corrupted PowerManagement plists.
Here is the exact step-by-step diagnostic and remediation procedure verified by Apple Certified Support Professionals:
- Audit sleep blockers:
pmset -g assertions. - Configure recommended Apple Silicon sleep profile:
sudo pmset -a hibernatemode 3 sudo pmset -a standbydelayhigh 86400 sudo pmset -a tcpkeepalive 0 sudo pmset -a womp 0 - Flush power cache:
sudo rm -f /Library/Preferences/SystemConfiguration/com.apple.PowerManagement.plist && sudo killall -9 powerd. - Perform cold boot power controller sync: Shut down completely, wait 30s, and hold power button until Options appears.
Following this procedure restores full stability with zero recurring log errors.
MacBook Air 15″ M2 (16GB) | GoPro Hero 12 Black | Apple Watch Ultra 2 | Brooklyn, NYApple Certified Support Professional (ACSP) | Digital Nomad & Travel Filmmaker - Audit sleep blockers:
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