1. Create Bootable Catalina Installer
2. Make A Catalina Usb Installer
3. Make Bootable El Capitan Usb On Catalina Download

These advanced steps are primarily for system administrators and others who are familiar with the command line. You don't need a bootable installer to upgrade macOS or reinstall macOS, but it can be useful when you want to install on multiple computers without downloading the installer each time.

If it isn’t formatted to GUID Partition Map and Mac OS Extended (Journaled), you can launch the Disk Utility application and format it from there. This will wipe all data from the drive. 4) To make this guide a little easier, name the finished USB drive USB. 5) Now open up a Terminal session and paste in the following command.

Make sure the copy of “Install OS X El Capitan” is there on /Applications folder. Bootable USB Installers for OS X Mavericks, Yosemite, El Capitan, and Sierra First, review this introductory article: Create a bootable installer for macOS. Second, see this How To outline for creating a bootable El Capitan installer. Nov 24, 2019 I read through it though but what I needed was a way to make a bootable El Capitan USB (for use in an older Mac) while on a newer Mac running Catalina. The OS of the older Mac has been corrupted and cannot boot. Yes I have downloaded El Capitan (InstallMacOSX.dmg) and renamed it to Capitan.app in the Applications folder.

What you need to create a bootable installer

• A USB flash drive or other secondary volume formatted as Mac OS Extended, with at least 14GB of available storage
• A downloaded installer for macOS Big Sur, Catalina, Mojave, High Sierra, or El Capitan

Turn on your Mac and continue to hold the power button until you see the startup options window, which shows your bootable volumes and a gear icon labled Options. Select the volume containing the bootable installer, then click Continue. When the macOS installer opens, follow the onscreen instructions. Turn on your Mac and continue to hold the power button until you see the startup options window, which shows your bootable volumes and a gear icon labelled Options. Select the volume containing the bootable installer, then click Continue. When the macOS installer opens, follow the onscreen instructions. This guide will walk you through creating a bootable installer for macOS Catalina on a USB flash drive for the purpose of installing Catalina on a hackintosh compatible computer. Prerequisites: Catalina downloaded from the Mac App Store. In such a case, use a working Mac to run the activated software, then create a recovery USB drive. Connect the recovery drive to your non-booting Mac and access your data. Apart from recovering data, Stellar Data Recovery Premium for Mac helps you repair your corrupt photos and videos.

• One way is to use DiskMakerX to create a bootable USB drive with a downloaded install image of the OSX loaded on it. This method requires 1) a functioning second Mac for running DiskMakerX and 2) a USB drive with at least 12 GB available. The method is summarized in a comment in this Apple Community discussion thread.
• Aug 18, 2021 A downloaded installer for macOS Big Sur, Catalina, Mojave, High Sierra, or El Capitan Turn on your Mac and continue to hold the power button until you see the startup options window, which shows your bootable volumes and a gear icon labled Options.

Download macOS

• Download: macOS Big Sur, macOS Catalina, macOS Mojave, or macOS High Sierra
  These download to your Applications folder as an app named Install macOS [version name]. If the installer opens after downloading, quit it without continuing installation. To get the correct installer, download from a Mac that is using macOS Sierra 10.12.5 or later, or El Capitan 10.11.6. Enterprise administrators, please download from Apple, not a locally hosted software-update server.
• Download: OS X El Capitan
  This downloads as a disk image named InstallMacOSX.dmg. On a Mac that is compatible with El Capitan, open the disk image and run the installer within, named InstallMacOSX.pkg. It installs an app named Install OS X El Capitan into your Applications folder. You will create the bootable installer from this app, not from the disk image or .pkg installer.

Use the 'createinstallmedia' command in Terminal

1. Connect the USB flash drive or other volume that you're using for the bootable installer.
2. Open Terminal, which is in the Utilities folder of your Applications folder.
3. Type or paste one of the following commands in Terminal. These assume that the installer is in your Applications folder, and MyVolume is the name of the USB flash drive or other volume you're using. If it has a different name, replace MyVolume in these commands with the name of your volume.

Big Sur:*

Catalina:*

Mojave:*

High Sierra:*

El Capitan:

* If your Mac is using macOS Sierra or earlier, include the --applicationpath argument and installer path, similar to the way this is done in the command for El Capitan.

After typing the command:

1. Press Return to enter the command.
2. When prompted, type your administrator password and press Return again. Terminal doesn't show any characters as you type your password.
3. When prompted, type Y to confirm that you want to erase the volume, then press Return. Terminal shows the progress as the volume is erased.
4. After the volume is erased, you may see an alert that Terminal would like to access files on a removable volume. Click OK to allow the copy to proceed.
5. When Terminal says that it's done, the volume will have the same name as the installer you downloaded, such as Install macOS Big Sur. You can now quit Terminal and eject the volume.
   

Use the bootable installer

Determine whether you're using a Mac with Apple silicon, then follow the appropriate steps:

Apple silicon

Create Bootable Catalina Installer

1. Plug the bootable installer into a Mac that is connected to the internet and compatible with the version of macOS you're installing.
2. Turn on your Mac and continue to hold the power button until you see the startup options window, which shows your bootable volumes and a gear icon labled Options.
3. Select the volume containing the bootable installer, then click Continue.
4. When the macOS installer opens, follow the onscreen instructions.

Intel processor

1. Plug the bootable installer into a Mac that is connected to the internet and compatible with the version of macOS you're installing.
2. Press and hold the Option (Alt) ⌥ key immediately after turning on or restarting your Mac.
3. Release the Option key when you see a dark screen showing your bootable volumes.
4. Select the volume containing the bootable installer. Then click the up arrow or press Return.
   If you can't start up from the bootable installer, make sure that the External Boot setting in Startup Security Utility is set to allow booting from external media.
5. Choose your language, if prompted.
6. Select Install macOS (or Install OS X) from the Utilities window, then click Continue and follow the onscreen instructions.

Learn more

For more information about the createinstallmedia command and the arguments that you can use with it, make sure that the macOS installer is in your Applications folder, then enter the appropriate path in Terminal:

• Big Sur: /Applications/Install macOS Big Sur.app/Contents/Resources/createinstallmedia
• Catalina: /Applications/Install macOS Catalina.app/Contents/Resources/createinstallmedia
• Mojave: /Applications/Install macOS Mojave.app/Contents/Resources/createinstallmedia
• High Sierra: /Applications/Install macOS High Sierra.app/Contents/Resources/createinstallmedia
• El Capitan: /Applications/Install OS X El Capitan.app/Contents/Resources/createinstallmedia

A bootable installer doesn't download macOS from the internet, but it does require an internet connection to get firmware and other information specific to the Mac model.

Summary: This blog helps you repair your APFS or HFS partition on Mac SSD or hard drive. Download the free-to-try data recovery software for Mac to rescue APFS or HFS partition data.

If you are using macOS Big Sur, Catalina, or Mojave, then most likely, your internal storage drive is partitioned in APFS format. In case your Mac is running on macOS Sierra or OS X Lion, the internal drive partition may be in the HFS+ format. Many users, these days, are upgrading their macOS and moving to APFS to be on par with the current technology.

If your APFS or HFS partition is not functioning properly due to aging or usage, repair the partition immediately to avoid data loss. The next section describes how to fix an APFS or HFS+ partition.

1. Repair Damaged APFS or HFS Partition by Using Disk Utility

You must be using Disk Utility in your system to perform disk management tasks. You can also use it to repair your logically damaged APFS or HFS partition.

To fix your APFS or HFS partition using Disk Utility, do the following:

Make A Catalina Usb Installer

Step 1) Press Command + Space Bar to launch Spotlight, and then type ‘disk utility’ and press Return. The Disk Utility window will open. Or else, navigate to Finder > Applications > Utilities > Disk Utility. Double-click the Disk Utility icon to launch it on your Mac.

Step 2) Select an APFS or HFS partition from the left pane of the Disk Utility window. From the top pane, click the First Aid tab, then click Run. Disk Utility will analyze the partition and repair any logical errors.

Step 3) If Disk Utility can’t repair the partition, it suggests the next action course. For instance, “Disk Utility fails to repair the startup disk. Backup as much data as possible and erase this drive.” Read More: APFS Data Recovery

To repair “Macintosh HD,” the partition that stores your macOS, perform the following steps:

Step 1) Start or restart your Mac, then immediately press and hold Command + R keys; release the keys when the Apple logo appears. Your Mac will boot into macOS Recovery mode.

Step 2) From macOS Utilities, select Disk Utility, then click Continue. From the sidebar of Disk Utility, select Macintosh HD the startup disk, then click the First Aid tab. Next, click Run to initiate the repair process.

Step 3) When the repair is unsuccessful, recover data from the drive using a data recovery software for Mac (as explained next). Next, erase the drive and reinstall macOS. Finally, restore the recovered data.

2. Recover Failing or Irreparable Partition Data by Using Software

Download high sierra dmg bootable. When your non-startup Mac APFS or HFS volume is severely corrupt or inaccessible, you won’t be able to back up its data as you would typically do. In such a scenario, you need to recover your data using a data recovery software for Mac. The recovery steps are as follows:

Step 1) Download and install the *trial version of Stellar Data Recovery Premium for Mac on your MacBook Pro/Air, iMac, or Mac mini.

Step 2) Launch the software, and from the “Select What to Recover screen,” specify the type of file that you wish to recover, then click Next.

Step 3) From the “Select Location” screen, select the non-startup APFS or HFS partition, toggle on Deep Scan, and then click Scan. Allow the software to scan your drive.

Step 4) Preview the scanned files, select the required ones, then click Recover. Specify a different drive location, then click Save. Navigate to the save location to check all your recovered data.

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*Trial version of Stellar Data Recovery Premium for Mac allows free scan and preview but needs activation to recover data. Activate the software with complete assurance as it has a 30-day money-back guarantee.

In case your Macintosh HD is severely corrupt or inaccessible, your Mac won’t boot. In such a case, use a working Mac to run the activated software, then create a recovery USB drive. Connect the recovery drive to your non-booting Mac and access your data. Read More.

Apart from recovering data, Stellar Data Recovery Premium for Mac helps you repair your corrupt photos and videos. Use the file repair feature in case you find some of your recovered photo and video files corrupted due to bad sectors on the Mac partition.

Make Bootable El Capitan Usb On Catalina Download

Conclusion

Make Dmg Bootable Usb Mac Catalina

This blog focused exclusively on repairing a corrupt Mac startup or non-startup APFS or HFS partition. But if macOS can’t fix your disk, you need to use Stellar Data Recovery Premium for Mac to salvage your data. The software has four unique features to provide you with data recovery, drive monitoring, and repair module for photos and videos. For any query related to APFS or HFS partition repair and recovery, ask us in the comment box below.