Jan 17, 2013 - [Editor's Note: This is an excerpt from Master Your Mac, a new book for Mac users who want to travel beyond the basics. Click here to learn.

This blog guides you to create a bootable macOS Mojave USB install drive or a recovery USB drive. Minimum requirement: 8 GB USB flash drive, Mac, and Mojave installer. Preinstalled recovery drive in iMac / MacBook / Mac Mini / Mac Pro is an important feature, as this can help users to restore their Mac to factory settings easily, without the need to download macOS. However, in case the users require installing new macOS Mojave on multiple systems, then downloading the macOS installer on each machine is not a good idea.

This is because the installer deletes itself once you have installed the macOS on your computer. You need to keep a copy of the installer and create a USB install drive. This installer drive serves as a means to install the new macOS Mojave on multiple Mac machines. Moreover, it serves as a portable recovery drive in case your Mac fails to boot. Steps to Create a USB Install Drive • Download macOS Mojave 10.14 from App Store. • When the download completes, quit the installer, as it will launch itself automatically.

• Locate the installer from the Applications folder (copy it to the desktop if you desire). • Connect the USB flash drive with at least 8 Gigabytes storage space to your Mac. Best ssd for 2010 mac pro. • Open Terminal and enter the next command: sudo (drag and drop the installer from application folder to locate its path) –volume (drag and drop the USB flash drive from the Mac volumes to specify its path) –nointeraction –downloadassets Warning: The command erases the flash drive so check there are no stored files; backup the files, if they exist, before executing the sudo command. • Type the administrator password when prompted. The Terminal creates the installer drive on the opted USB flash drive.

Note: Erase the flash drive to HFS+ (Mac OS Extended (Journaled)) but not APFS. Usage of USB Install Drive • Backup the entire drive before performing a clean install on your Mac machine. • Connect the USB install medium. • For T2 security chip supported by 2018 MacBook Pros and iMac Pros, you need to “allow booting from external media” from Startup Security Utility. Alternatively, hold the option key and reboot the Mac then use the arrow key to select the USB flash drive as an installer.

• Allow the computer to boot from the USB flash drive. Deploy the macOS Mojave software. Installer Tips • When Apple releases newer Mojave versions, re-download the new installer and recreate installer drive to keep it up to date.

• Keep the installer drive on a safe place so that you can use it as an external recovery drive when your Mac gets into trouble. Data Recovery on macOS: Why We Need It Here While performing macOS upgrade or fresh installation, you must back up data to an external storage medium. Backup helps to restore all the data back to Mac’s internal storage drive, containing the new macOS. If you do not have a backup, then you end up losing all your data stored in the Mac drive. This is because, during macOS installation, the installer erases the startup partition completely or the entire storage drive, depending upon your choice during installation. If No Backup: What Is the Recourse?

There are chances that you did not take backup to an external backup drive, or in the rare case, the backup itself was lost, damaged, or unavailable. In such scenarios, you can rely on a data recovery software—such as the editor’s choice Stellar Data Recovery Professional for Mac—that can recover your lost data after macOS Mojave installation. The software works flawlessly with the older & newer version of MacBook Pro, MacBook Air, iMac, iMac Pro, and Mac Mini etc.

The Process of Data Recovery The process of data recovery is straightforward. Follow the steps mentioned below to get back the data stored in the drive—erased completely after installing the new macOS Mojave: • Download and install the Mac data recovery utility on the same system where you have installed the new macOS Mojave (due to the negligible storage requirement of the utility). • Alternately, you can download and install the utility on a different Mac machine, then connect the internal drive as an external device by removing it from the affected Mac. • Launch the data recovery software to interact with its lucid graphical user interface. • In the Recover Data module, select the type of data and the location of the storage drive. • Toggle on the Deep Scan switch from the bottom left and click the Scan • Allow the scan to complete, which may take some time—depending on the storage size and the condition of the affected drive. • Preview the recoverable files if you want, then select all the required files and click the Recover • Specify a different external backup drive with size greater than the drive where you are performing the data recovery then click Save.