How to Reinstall macOS On Any Mac

Today you'll learn How to Reinstall macOS On Any Mac device
Reinstalling macOS on a MacBook Air 2017 involves a few steps. Before you begin, please make sure to back up any important data you have on your MacBook, as reinstalling the operating system will erase all the data on your internal drive.
Here are the steps to reinstall macOS on a MacBook Air 2017:
Backup Your Data:
Connect an external hard drive or use a cloud service like iCloud or Google Drive to back up your important files.
Connect to a Stable Internet Connection:
Make sure your MacBook is connected to a stable Wi-Fi network.
Restart Your MacBook:
Click on the Apple menu in the top-left corner of the screen.
Select "Restart".
Boot into macOS Recovery:
As soon as your MacBook restarts, hold down the Command + R keys on your keyboard until you see the Apple logo or a spinning globe.
This will boot your MacBook into macOS Recovery.
Erase the Hard Drive:
In macOS Recovery, select "Disk Utility" and click "Continue".
In Disk Utility, select your internal hard drive (usually named "Macintosh HD" or similar) from the list on the left.
Click on the "Erase" tab.
Choose a name for your disk (you can keep the default name "Macintosh HD" if you want).
Select the format (usually APFS for SSDs, or Mac OS Extended (Journaled) for older drives).
Click "Erase" and confirm.
Reinstall macOS:
Close Disk Utility to go back to the main macOS Recovery screen.
Select "Reinstall macOS" and click "Continue".
Follow the on-screen instructions to choose your disk and complete the installation process.
Restore from Backup (Optional):
After the installation is complete, you can choose to restore your data from the backup you made earlier during the setup process.
Complete the Setup:
Follow the on-screen instructions to set up your MacBook as a new device or restore from a backup.
That's it! Your MacBook Air 2017 should now have a fresh installation of macOS. Remember to reinstall any applications you need and restore your files from the backup.