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Reply To: [Solved] MacBook Pro 14″ M1 Max encountering External Display Flickering at High Refresh Rates after update (macOS Sonoma 14.7)

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Home › Forums › MacBook, iMac & macOS Lab › [Solved] MacBook Pro 14″ M1 Max encountering External Display Flickering at High Refresh Rates after update (macOS Sonoma 14.7) › Reply To: [Solved] MacBook Pro 14″ M1 Max encountering External Display Flickering at High Refresh Rates after update (macOS Sonoma 14.7)

November 14, 2026 at 10:03 pm #13078
Timothy Krueger
Community Contributor
Apple Recommended / Verified Community Solution
This canonical solution was verified and marked as solved in the Apple Support Community archive.

Locking refresh rate to a fixed frequency, disabling Variable Refresh Rate (VRR), and regenerating WindowServer display plists.

Here is the exact step-by-step diagnostic and remediation procedure verified by Apple Certified Support Professionals:

  1. In System Settings > Displays, set Refresh Rate to fixed 120Hz or 100Hz instead of Variable (VRR).
  2. Reset display preferences: 
    sudo rm -f /Library/Preferences/com.apple.windowserver.displays.plist
rm -f ~/Library/Preferences/ByHost/com.apple.windowserver.displays.*.plist
killall -9 WindowServer
  3. In monitor physical OSD menu, set DisplayPort mode to ‘DP 1.4 Standard’ without aggressive DSC overdrive.

Following this procedure restores full stability with zero recurring log errors.

Apple Vision Pro (512GB) | MacBook Pro 16″ M3 Max | Magic Trackpad | Berlin, DE
Apple Certified Support Professional (ACSP) | visionOS Spatial Computing Developer