Download Mac Restore Disk

Apple hasn’t shipped operating systems on physical media in a full decade, but there are still good reasons to want a reliable old USB stick for macOS Catalina. Luckily, it's not hard to make one—either with a handy graphical user interface or some light Terminal use. Here's what you need to get started:

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  • A Mac that you have administrator access to. We've created a USB stick from both Mojave and Catalina, but your experience with other versions may vary.
  • A 16GB or larger USB flash drive or a 16GB or larger partition on some other kind of external drive. A USB 3.0 drive will make things significantly faster, but an older USB 2.0 drive will work in a pinch; 8GB drives worked for Mojave and older versions of macOS, but the Catalina installer is just a little too large to fit.
  • The macOS 10.15 Catalina installer from the Mac App Store (in High Sierra or older macOS versions) or the Software Update preference pane in Mojave. The installer will delete itself when you install the operating system, but it can be re-downloaded if necessary.
  • If you want a GUI, take a look at Ben Slaney's Install Disk Creator from MacDaddy. There are other apps out there that do this, but this one is quick and simple.

If you want to use this USB installer with newer Macs as they are released, you'll want to periodically re-download new Catalina installers and make new install drives. Apple rolls support for newer hardware into new macOS point releases as they come out, so this will help keep your install drive as universal and versatile as possible.

There's also one new consideration for newer Macs with Apple's T2 controller chip—as of this writing, that list includes the iMac Pro, the 2018 Mac Mini, the 2018 MacBook Air, and 2018 and 2019 MacBook Pros, though Apple keeps an updated list here. Among this chip's many security features is one that disallows booting from external drives by default. To re-enable this feature, hold down Command-R while your Mac reboots to go into Recovery Mode and use the Startup Security Utility to 'allow booting from external media.' If you're trying to install an older version of macOS, you may also need to go from Full Security to Medium Security to enable booting, but if you're just trying to install the current version of macOS, the Full Security option should be just fine. And if you're just doing an upgrade install rather than a clean install, you can run the Catalina installer from the USB drive from within your current installation of macOS, no advanced tweaking required.

The easy way

Once you've obtained all of the necessary materials, connect the USB drive to your Mac and launch the Install Disk Creator. This app is basically just a GUI wrapper for the terminal command, so it should be possible to make install disks for versions of macOS going all the way back to Lion. In any case, it will work just fine for our purposes.

Install Disk Creator will automatically detect macOS installers on your drive and suggest one for you, displaying its icon along with its path. You can navigate to a different installer if you want, and you can also pick from all the storage devices and volumes currently connected to your Mac through the drop-down menu at the top of the window. Once you're ready to go, click 'Create Installer' and wait. A progress bar across the bottom of the app will tell you how far you have to go, and a pop-up notification will let you know when the process is done. This should only take a few minutes on a USB 3.0 flash drive in a modern Mac, though using USB 2.0 will slow things down.

The only slightly less-easy way

The Install Disk Creator is just a wrapper for the terminal command to create macOS install disks, so if you’re comfortable formatting your USB drive yourself and opening a Terminal window, it’s almost as easy to do it this way. Assuming that you have the macOS Catalina installer in your Applications folder and you have a Mac OS Extended (Journaled)-formatted USB drive (which is to say, HFS+ and notAPFS) named 'Untitled' mounted on the system, you can create a Catalina install drive using the following command.

sudo /Applications/Install macOS Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled

The command will erase the disk and copy the install files over. Give it some time, and your volume will soon be loaded up with not just the macOS installer but also an external recovery partition that may come in handy if your hard drive dies and you're away from an Internet connection. If you would like to create an install drive for a macOS version other than Catalina, just tweak the paths above to refer to Mojave or High Sierra instead.

Whichever method you use, you should be able to boot from your new USB drive either by changing the default Startup Disk in System Preferences or by holding down the Option key at boot and selecting the drive. Once booted, you'll be able to install or upgrade Catalina as you normally would. You can also use Safari, Disk Utility, or Time Machine from the recovery partition to restore backups or troubleshoot.

Summary: Are you dealing with a crashed Mac or unable to boot your Mac machine?
Before you think of reinstalling macOS or doing a hardware fix, ensure that you’ve rescued your data from the device.
This blog will guide you through an easy process of creating a bootable macOS Mojave USB install drive or a recovery USB drive using Stellar Data Recovery for Mac software.
The USB recovery drive will help you to recover the data from your crashed or non-booting macOS. So go ahead, download the free software trial now.
Minimum requirement: 8 GB USB flash drive, Mac, and Mojave installer.

Mac
  1. Download macOS Mojave 10.14 from App Store.
  2. When the download completes, quit the installer, as it will launch itself automatically.
  3. Locate the installer from the Applications folder (copy it to the desktop if you desire).
  4. Connect the USB flash drive with at least 8 Gigabytes storage space to your Mac.
  5. 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.

  1. 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

  1. Backup the entire drive before performing a clean install on your Mac machine.
  2. Connect the USB install medium.
  3. 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.
  4. 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:

1. 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).

2. 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.

3. Launch the data recovery software to interact with its lucid graphical user interface.

Download Mac Restore Disk

4. In the Recover Data module, select the type of data and the location of the storage drive.

5. Toggle on the Deep Scan switch from the bottom left and click the Scan

Recovery

6. Allow the scan to complete, which may take some time—depending on the storage size and the condition of the affected drive.

Download Mac Restore Disk Recovery

7. Preview the recoverable files if you want, then select all the required files and click the Recover

8. Specify a different external backup drive with size greater than the drive where you are performing the data recovery then click Save.

When the save process is complete, verify the recovered data from the backup storage drive. Copy the files back to your Mac or an externally used Mac drive (reconnect the drive to the Mac once the restoration process is over).

Activation of the Software

You must activate Stellar Data Recovery Professional on your Mac in order to save the recoverable files. The free download version of the software is a good way to know the software’s interface, scan your drive, and preview the recoverable files.

Download Mac Restore Disk Recovery Tool

Watch the activation video of Stellar Data Recovery Professional to know how to activate the software and use its complete functionality, including the complementary Drive Monitor, on your iMac or MacBook system.

Download Boot Disk For Mac

Conclusion

Download Mac Os Disk Image

The blog highlighted the need for recovery drive, steps to create a bootable USB flash drive, and usage of the drive for installing the new macOS Mojave 10.14 in one or multiple computers. The drive acts as an external recovery drive in case your Mac fails to boot. In addition, the drive acts as a means to fresh install the drive to boost the performance of your slow, virus-infected, or troubled Mac. The blog also suggested a data recovery software that can help recover data lost due to macOS Mojave installation on your desktop or notebook computer.