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To reset your MacBook, restart it and immediately hold down Command + R to enter Recovery Mode. From there, you can use Disk Utility to erase your drive and reinstall macOS. Make sure to back up your data first!
Common causes include too many startup items, insufficient storage space, outdated software, or background processes consuming resources. Check Activity Monitor (Applications > Utilities) to identify resource-heavy apps.
Click the Apple menu > About This Mac > Storage. Use the "Manage" button to see recommendations. Delete unnecessary files, empty Trash, remove old downloads, and consider moving large files to external storage or cloud services.
First, ensure it's charged by connecting the power adapter for at least 15 minutes. Try resetting the SMC by holding Shift + Control + Option + Power button for 10 seconds. If it still won't turn on, contact Apple Support.
Go to Apple menu > About This Mac and note your serial number. Visit checkcoverage.apple.com and enter your serial number to check warranty status and AppleCare coverage.
For newer MacBooks (2016+), RAM and storage are typically soldered to the logic board and cannot be upgraded. Older models may have upgradeable components. Check your specific model's specifications before attempting any upgrades.