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.

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Oct 23, 2019  What happens if something goes wrong with the external drive and you can't boot? In a matter of seconds, you can boot from the internal and be 'running again' to work on the problem. BTW, the external boot drive will run fine. I used a USB3 SSD to boot my 2012 Mini since the day I took it out of the box in 2013 - still runs fine using that method. Intro 💅 I 'rescued' a 2018 mac mini(8th Gen i3, 8Gb Ram, 128SSD). My idea was to use it for my personal home recording studio. I read the ram was upgradeable but the storage is sadly soldered into the unit. IFixit awarded the new Mac mini a repairability score of 6/10, with 10 being the easiest to repair, topping the latest MacBook Air, MacBook, MacBook Pro, iMac, and iMac Pro, and trailing. Mar 10, 2020  You're Mac will boot into macOS Utilities. If it doesn't, try again. Click on Disk Utility. Click Continue. Select your Mac's hard drive. Click the Restore tab at the top of the Disk Utility window. Select the external hard drive that your cloned backup is stored next to 'Restore From.' Select your Mac's hard drive next to 'Restore to.'

Download macOS

Find the appropriate download link in the upgrade instructions for each macOS version:

macOS Catalina, macOS Mojave, ormacOS High Sierra
Installers for each of these macOS versions download directly to your Applications folder as an app named Install macOS Catalina, Install macOS Mojave, or Install macOS High Sierra. If the installer opens after downloading, quit it without continuing installation. Important: 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.

OS X El Capitan
El Capitan downloads as a disk image. 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. Make sure that it has at least 12GB of available storage and is formatted as Mac OS Extended.
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 still 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.
   Catalina:*
   Mojave:*
   
   High Sierra:*
   El Capitan:
   
4. Press Return after typing the command.
5. When prompted, type your administrator password and press Return again. Terminal doesn't show any characters as you type your password.
6. When prompted, type Y to confirm that you want to erase the volume, then press Return. Terminal shows the progress as the bootable installer is created.
7. When Terminal says that it's done, the volume will have the same name as the installer you downloaded, such as Install macOS Catalina. You can now quit Terminal and eject the volume.

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

Use the bootable installer

After creating the bootable installer, follow these steps to use it:

1. Plug the bootable installer into a compatible Mac.
2. Use Startup Manager or Startup Disk preferences to select the bootable installer as the startup disk, then start up from it. Your Mac will start up to macOS Recovery.
   Learn about selecting a startup disk, including what to do if your Mac doesn't start up from it.
3. Choose your language, if prompted.
4. A bootable installer doesn't download macOS from the Internet, but it does require the Internet to get information specific to your Mac model, such as firmware updates. If you need to connect to a Wi-Fi network, use the Wi-Fi menu in the menu bar.
5. 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 this path in Terminal:

Catalina:

Mac Boot From External Ssd

Mojave:

High Sierra:

El Capitan:

Jun 08, 2020 • Filed to: Solve Mac Problems • Proven solutions

If you have tried partitioning a hard drive without any previous experience then you understand that it is a daunting task. Handling the Mac partition manager is not as easy as it sounds. Once you learn the process, it gets pretty easy. The good thing is that you don’t need any external or third-party tool for partitioning.

So, in this article, we are going to guide you through partition and unpartition on Mac without any hassle.

Part 1. What Does Other Mean in Mac Storage?

Before you step into detail, first you need to understand what exactly the term partitioning means.

By Partitioning your Mac drive, you split the hard drive in two or more separate, usable systems. This feature allows the users to run multiple OS on the same system/device such as Windows and macOS simultaneously. You can even run two versions of macOS on the same system. The partitioning also divides the storage space on the hard drive. And a specific portion goes to each partition. So, if you are running out of storage, it is advised that either you extend the storage or avoid partitioning at all.

Here are some advantages of Partitioning that will convince you that it is beneficial for the users.

• You get to switch between different versions of OS X including Tiger, Leopard, or Snow Leopard at the same time.
• The users can use the Boot Camp Assistant to run Windows OS on the Mac system. This way, you get to save some bucks and efforts to maintain two separate systems for your needs.
• During the startup Volume disk errors, it is needed that the repair program is run from another volume to fix the errors. Partitioning of Mac allows the users to keep a disk where the bootable copy of OS X is stored and it can be used to run Disk Utility.
• You can share your iPhoto Library between two or more user accounts on Mac after partitioning.
• Partitioning also allows Mac users to manage their backups efficiently. You can use Mac Time Machine without using an external hard drive.

If you opt out for partitioning, make sure that your Mac has enough space otherwise the disk performance would decline and you might experience some working issues in both drives.

Part 2. How to Partition a Hard Drive on Mac?

There are two methods that allow the users to create a partition on Mac. The first method is using Disk Utility and the second one is using Boot Camp. Both these methods work great to partition hard drive on Mac.

Method 1. Disk Utility:

The Disk Utility is used when you wish to partition Mac and wants to install a different version of the same OS. As we all know, Disk Utility can perform various tasks on Mac including repair and partition. The Mac partition Manager is used for this process. Before you initiate the process, it is advised that you create a full backup of your device data in case some fault arises. This way, if anything goes wrong, you will still have a copy of your data files.

Boot Imac From External Drive

Now, follow the steps given below to partition your Mac drive:

1. Press Command + Shift + U keys from the keyboard or access the Utilities in the Application folder. Open the Disk Utility application and select the Mac Internal drive.
2. You will see two options in the window, i.e. First Aid and Partition. Click on the Partition option and hit the “+” icon.
3. A new partition will appear on the screen and you can set the storage space according to your requirements.
4. Give a name to the new drive and tap on the Apply button. You might have to click on a lock symbol to finalize the actions.

You can make changes to the drive even after you’ve created the partition. When the process is finished, the partition will be visible on the main drive. The partition size can also be modified later when required.

Method 2. Boot Camp:

Remember that you cannot partition hard drive on Mac using Disk Utility if you want to install Windows on the other partition. The Boot Camp Assistant is a handy application for partitioning your Mac drive so that you can run and operate macOS and Windows altogether. In the later version of Mac, this application is pre-installed, so you only need to open it and follow the steps below:

1. Open Application and go to Utilities. There you will find the Boot Camp Assistant. Double-click on the option to open the Boot Camp and print a copy of the installation and setup guide.
2. Click on the Create or Remove a Windows Partition option and Continue with the steps.
3. Now, you have to select a hard drive for partition. If you already have multiple drives, you can select any one which you prefer.
4. Determine the size of the partition for Windows OS. You can’t make a partition smaller than 5 GB and it is recommended that you at least keep 20GB of space for your partitions.
5. Click on the Partition button at the bottom of the interface and your new partitions will be ready to use.

Now all there is left to do is to insert the Windows Installation disk and you will have multiple OS working on the same Mac system.

Macbook Boot From External Drive

By following the same methods you can partition an external hard drive on Mac whenever you want.

Part 3. How to Delete Other Storage on Mac?

We have learned how to create a partition but knowing how to unpartition hard drive on Mac is also crucial. The good thing is that the steps are not much different from the above procedure.

Using Disk Utility:

If you wish to erase or remove the macOS partition, then you’ll have to use Disk Utility. You need to follow the steps as:

1. Launch Disk Utility and click on the Partition which you want to delete from the volume.
2. Here, select “Go”>” Go to Folder” or you can use “Shift + Cmd + G” shortcut.
3. Switch to the Erase tab and ensure that the Mac OS X Extended is chosen. Tap on the Erase button to delete the partition.
4. After that, choose the app folder you want to get rid of it. Next, drag it to trash to delete them from your Mac.

Within a while, the reallocated space will be distributed and you will be able to close Disk Utility.

Using Boot Camp:

As you used Boot Camp Assistant to create the Windows partition, you’ll also have to use the same app for removing the partition.

1. Boot your Mac into the Mac OS X and open the Boot Camp Assistant. As the application interface opens up, you will see the Install or remove Windows option.
2. Continue and choose the Restore Disk to a single Mac OS partition option from the screen. Finalize the changes and hit the Restore button to begin the removal process.

It will take a while to remove the partition and when it is done, you can exit the Boot Camp.

Part 4. How to Recover Lost Data When Partitioning Mac?

The most common reasons why data get lost from a drive are given below:

• During hard drive partition
• Drive format
• System crash
• Virus attack

Apart from these, there are other reasons too but these are the reasons which mainly affect the Mac hard drive. And as a result, data gets lost from the system. But you don’t have to worry about that now as Recoverit is here.

Recoverit - The Best Software to Recover Word Files:

Whenever you experience a data loss situation, Recoverit Data Recovery Mac will help you to retrieve it. This data recovery software will come in handy even when you’ve never made a backup of your device. You now know how to partition Mac hard drive and unpartition it. But knowing how you can recover the lost or deleted files from the drive is also necessary.

How to Recover Lost Word Files on Mac:

Step 1: Select a Location

Launch the software and select the drive from where the data files are lost. If you don’t know which drive to search, tap on the “I can’t find my partition” option and hit the Start button.

Step 2: Scan the Location

Typically, the software will run an All-Around Recovery scan and search for the lost and deleted files on the entire drive.

Step 3: Preview and Recover

When the scan completes, the files will be listed on the screen. The software will sort out the files according to format to make the search easier. You can select multiple files at a time and have a preview at them.

Part 5. Tips for Deleting Other Files on Mac

Maybe you even know how to unpartition a hard drive on Mac; you still have to be careful during carrying out the procedure. So, here are some tips worth keeping mind to make sure that you don’t end up with some random error using partitioning or unpartitioning.

• The most important thing that you should do before starting is to create a backup of your Mac data.
• Keep this in mind when you are creating and removing the partition that the partition created by Disk Utility can only be removed by Disk Utility. And the partition created by Boot Camp will only be deleted by Boot Camp Application.
• After you create a partition, you’ll also have to install the other version of OS you want to run.
• You can also create a partition on the system using the external drive.
• It is recommended that you keep a standard amount of 50 GB space for the partition.

Conclusion

It can be concluded that creating and removing a Mac drive partition is not that tough. You just have to careful during the process. And in case of a mishap, Recoverit is always here for your help so that you don’t have to suffer from data loss situation.

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