Skip to content
MappleCare Community ↗

MappleCare Community

Reply To: [Solved] Mac mini M4 Pro External Display Flickering at High Refresh Rates (macOS Sequoia 15.0.1) – Verified Troubleshooting

Find answers from other Apple users or start a discussion about your device.

All Forum Rooms

Home › Forums › MacBook, iMac & macOS Lab › [Solved] Mac mini M4 Pro External Display Flickering at High Refresh Rates (macOS Sequoia 15.0.1) – Verified Troubleshooting › Reply To: [Solved] Mac mini M4 Pro External Display Flickering at High Refresh Rates (macOS Sequoia 15.0.1) – Verified Troubleshooting

November 15, 2026 at 1:48 am #16887
Randy Mason
Apple Master (Lvl 10)
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.

MacBook Pro 16″ M3 Max (64GB) | Tether Tools Pro | SanDisk Extreme Pro 4TB | Copenhagen, DK
Apple Certified Support Professional (ACSP) | Commercial Photographer & Digitech