To download and install , you should use the official Apple App Store link or terminal-based methods to ensure security and stability. 1. Download Official Installer
Confirm that the installer is in your /Applications folder with the exact name . If it is located elsewhere, move it to /Applications before proceeding.
| Backup Type | Method | Recommended For | |-------------|--------|-----------------| | | External drive + Time Machine app | Full system recovery | | Clone Backup | Carbon Copy Cloner or SuperDuper | Bootable emergency drive | | Cloud Backup | iCloud, Google Drive, or Dropbox | Critical personal files | | Manual Copy | Drag-and-drop to external drive | Selective file backup |
Once you have your installer app or your configured DMG file ready, you can proceed with the installation phase. Step 1: Create a Bootable USB Drive
Copy and paste the following official Apple command into the Terminal window: