How to install macOS via usb-

Follows steps to install macOS via usb-

To install macOS via USB, you will need a USB flash drive with sufficient storage capacity and a macOS installation file (usually downloaded from the Mac App Store). Here is a general guide:

1. Prepare the USB drive:
   • Plug in your USB flash drive.
   • Format the USB drive to macOS Extended (Journaled) format using Disk Utility. You can find Disk Utility in the Utilities folder within the Applications folder on your Mac.
   • Give it a name like “Untitled”.
   • Make sure it is formatted as GUID Partition Map.
2. Download the macOS installer:
   • Go to Mac App Store and download the macOS installer. Once downloaded, it usually starts automatically, but if it doesn’t, you can find it in your Applications folder.
3. Create macOS installer:
   • Once the installer opens, close it. We don’t want to install macOS yet; instead, we will create a bootable installer.
   • Open Terminal from the Utilities folder in the Applications folder.
   • Use the following command to create a bootable macOS installer on your USB drive:
   sudo /Applications/Install\ macOS\ [Your_version_name].app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled --nointeraction
   • Replace [Your_Version_Name] with the name of the macOS version you downloaded (e.g. High Sierra, Mojave, Catalina, etc.).
   • Enter your administrator password when prompted.
   • The process will erase everything on the USB drive, so make sure you have backed up all important data.
4. Install macOS:
   • Once the bootable USB drive is created, restart your Mac.
   • While rebooting, hold down the Option key.
   • You should see a list of bootable drives. Select the USB drive with the macOS installer.
   • Follow the on-screen instructions to install macOS on your Mac.

Remember to back up all important data before starting the installation process, as it involves formatting the drives, which will erase all existing data on them.