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high sierra - Apple "13 2011 MacBook Pro touchpad battery faulty issue. (10.13.6 software problem) - Ask Different
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MacBook Air 11” mid 2011 slow with no battery installed : r/macbook
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MacOS 10.13.4 Update Failed to Complete? Mac Won't Boot? Troubleshooting Update Failures | OSXDaily
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How to Improve Your MacBook's Battery Life in macOS High Sierra
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Common Problems During and After macOS High Sierra Installation
