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When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.
How do i partition my hard drive, or my flash drive, or what is it that i must do in order to be able to boot up into my OS
MacBook Air
If you only need to reinstall.How to reinstall macOS - Apple Support
For clean install.Use Disk Utility to erase an Intel-based Mac - Apple Support
If you only need to reinstall.How to reinstall macOS - Apple Support
For clean install.Use Disk Utility to erase an Intel-based Mac - Apple Support
Are you trying to create a bootable macOS USB installer, or do you mean how you prepare the main drive for performing a clean install of macOS?
If you mean how to prepare the drive which will be the destination of the full macOS installation, then how you do this depends on the version of macOS you are installing since some versions of macOS require a certain file system, while installing macOS 10.10 or earlier, requires a completely different procedure for preparing the whole physical drive. We need the exact model of the Mac which you can get by clicking the Apple menu and selecting "About This Mac", or if the Mac is not booting into macOS, then enter your serial number here:
Check Your Service and Support Coverage - Apple Support
DISK UTIL
