After a successful startup recommend doing this: Run in Terminal. After the end - to be restarted. sudo rm-rf / System / Library / Extensions.mkext sudo rm-rf / System / Library / Extensions / Caches / & & sudo rm-rf / System / Library / Caches / sudo update_dyld_shared_cache-debug-force-root / sudo defaults write / Library / Preferences / com.apple.windowserver Compositordict deferredUpdates 0 sudo diskutil repairpermissions / sudo update_dyld_shared_cache-root /-force sudo periodic daily sudo periodic weekly sudo periodic monthly sudo reboot
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