Install Macos On Usb External Hard Drive

Follow these easy steps to clean install macOS Catalina on your Mac. Plug your USB stick or external hard drive into your Mac, if it’s not plugged in already. Restart your Mac while holding down the Option key. When you see the options for booting appear on screen, choose the installer disk you just created. I am looking to install macOS Catalina on an external hard drive, that of which is not an SSD but rather a plain, old HDD. I found a guide that can be used to install the OS on a partition within an internal hard drive in my PC, but I need to do it on an external.


An external drive that you can use as an installer for macOS Catalina is a handy thing to have. If you have multple Macs to upgrade, it’s a lot more efficient to plug in the USB installer drive and run the installer than to log into the App Store, download the 8.09GB OS installer, and then run it.

Oct 25, 2021 Install macOS on the external drive. Run macOS on the external drive by pressing Alt/Option at start up on an Intel-powered Mac, or pressing and holding the on switch on an M1 Mac. What you need If.

A) Select the hard drive or partition that you want to install Windows 10 on, and click/tap on the Drive Options (advanced) link. If the hard drive or partition that you have selected is shown as unallocated, then you can just click/tap on the Next button and go directly to step 16 below instead since it is already empty. Catalina Hackintosh Install Full Guide. This guide should work on most newer computers that are less than 5 years old. If you need a new system thats hackintosh compatible check out our list of compatible parts or the build list for hackintosh friendly parts. On macOS 10.15 and above, the system will prompt you for permission if iMazing attempts to access an external drive, a network drive, the Documents folder or the Desktop. This only happens if you have configured iMazing to back up to one of these protected locations, or to load backups from them. Download install macos mojave.

In this article I’ll go over the different ways you can create a bootable macOS Catalina installation drive. But before I give instructions on how to create the drive, I’ll go over the items you’ll need and how to get them.

Get an external drive and maybe an adapter

The macOS Catalina installer software is over 8GB, so you need a USB external drive that can hold that much data. The drive can be a thumb drive, hard drive, or SSD.

If you have a 2015 or newer MacBook or a 2016 or newer MacBook Pro, you may need Apple’s $19 USB to USB-C adapter. This will allow you to connect a storage device that uses a USB type-A connector. If you don’t have an external drive and you have a USB-C Mac laptop, you could buy the SanDisk Ultra USB Type-C Flash Drive, which has a USB-C connector. You can get model number SDCZ450-016G-G46.

When creating the boot drive, the storage device is reformatted, so there’s no need to format the drive beforehand.

Install Macos Catalina On External Hard Driver

Get the macOS Catalina installer software

The macOS Catalina installer is available in the App Store. If you launch the App Store app, do a search for “Catalina.” Or, if you click this Catalina App Store link, it will take you to the Catalina App Store webpage, then click on the “View in the Mac App Store” button.

You can read the information to learn more about Catalina. Free download macos high sierra. When you’re ready to download the software, click the Download button. (If you’ve already downloaded the installer, the button will say Install instead of Get.)

Once the download is complete, the installer will launch automatically. But don’t continue with the installation. Instead, press Command-Q on your keyboard to quit the installer.

The Catalina installer app will be in your Applications folder, so you can go there and launch it later to upgrade your Mac to the new operating system.

Make a bootable installer drive: The quick way

Install Catalina On Usb Drive

I used a free app called Install Disk Creator to make the installation drive. Download Install Disk Creator by clicking on the link. When the download is done, you can move it over to your Applications folder. Then follow these steps to create your bootable macOS Catalina drive.

1. Connect your drive to your Mac.

2. Launch Install Disk Creator.

3. In the main window, you’ll see a pop-up menu under Select the volume to become the installer. Click on the menu and select your drive.

4. Under the pop-up menu, you’ll see Select the OS X installer. (macOS used to be called OS X.) If you have only the Catalina installer on your Mac, Install Disk Creator will automatically select it. If you have other macOS installers, you need to click on Select the OS X installer and select the Catalina installer.

5. When you’re ready, click Create installer. Your Mac may tell you that Install Disk Creator wants to make changes, and you need to enter your user name and password. After you do this, the app will take a few minutes to create the boot drive. A progress bar. appears at the bottom of the Install Disk Create window.

If you try to start the process and you get a failure message saying that the drive couldn’t be unmounted, try reformatting the drive first as ExFAT using Disk Utility. Then start the process over again.

Can I Install Catalina On An External Drive

When the app is done, the installer is ready to use.

Install Mac Os On Usb External Hard Drive For Mac



Install Macos Catalina On External Hard Drive Windows 7

An external drive that you can use as an installer for macOS Catalina is a handy thing to have. If you have multple Macs to upgrade, it’s a lot more efficient to plug in the USB installer drive and run the installer than to log into the App Store, download the 8.09GB OS installer, and then run it.

A) Select the hard drive or partition that you want to install Windows 10 on, and click/tap on the Drive Options (advanced) link. If the hard drive or partition that you have selected is shown as unallocated, then you can just click/tap on the Next button and go directly to step 16 below instead since it is already empty. Catalina Hackintosh Install Full Guide. This guide should work on most newer computers that are less than 5 years old. If you need a new system thats hackintosh compatible check out our list of compatible parts or the build list for hackintosh friendly parts. On macOS 10.15 and above, the system will prompt you for permission if iMazing attempts to access an external drive, a network drive, the Documents folder or the Desktop. This only happens if you have configured iMazing to back up to one of these protected locations, or to load backups from them. Download install macos mojave.

In this article I’ll go over the different ways you can create a bootable macOS Catalina installation drive. But before I give instructions on how to create the drive, I’ll go over the items you’ll need and how to get them.

Get an external drive and maybe an adapter

The macOS Catalina installer software is over 8GB, so you need a USB external drive that can hold that much data. The drive can be a thumb drive, hard drive, or SSD.

If you have a 2015 or newer MacBook or a 2016 or newer MacBook Pro, you may need Apple’s $19 USB to USB-C adapter. This will allow you to connect a storage device that uses a USB type-A connector. If you don’t have an external drive and you have a USB-C Mac laptop, you could buy the SanDisk Ultra USB Type-C Flash Drive, which has a USB-C connector. You can get model number SDCZ450-016G-G46.

When creating the boot drive, the storage device is reformatted, so there’s no need to format the drive beforehand.

Get the macOS Catalina installer software

The macOS Catalina installer is available in the App Store. If you launch the App Store app, do a search for “Catalina.” Or, if you click this Catalina App Store link, it will take you to the Catalina App Store webpage, then click on the “View in the Mac App Store” button.

Can I Install Macos On External Drive

You can read the information to learn more about Catalina. Free download macos high sierra. When you’re ready to download the software, click the Download button. (If you’ve already downloaded the installer, the button will say Install instead of Get.)

Once the download is complete, the installer will launch automatically. But don’t continue with the installation. Instead, press Command-Q on your keyboard to quit the installer.

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The Catalina installer app will be in your Applications folder, so you can go there and launch it later to upgrade your Mac to the new operating system.

Make a bootable installer drive: The quick way

Install Catalina On Usb Drive

Install Macos On Usb External Hard Drive Windows 10

I used a free app called Install Disk Creator to make the installation drive. Download Install Disk Creator by clicking on the link. When the download is done, you can move it over to your Applications folder. Then follow these steps to create your bootable macOS Catalina drive.

1. Connect your drive to your Mac.

2. Launch Install Disk Creator.

3. In the main window, you’ll see a pop-up menu under Select the volume to become the installer. Click on the menu and select your drive.

4. Under the pop-up menu, you’ll see Select the OS X installer. (macOS used to be called OS X.) If you have only the Catalina installer on your Mac, Install Disk Creator will automatically select it. If you have other macOS installers, you need to click on Select the OS X installer and select the Catalina installer.

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5. When you’re ready, click Create installer. Your Mac may tell you that Install Disk Creator wants to make changes, and you need to enter your user name and password. After you do this, the app will take a few minutes to create the boot drive. A progress bar. appears at the bottom of the Install Disk Create window.

If you try to start the process and you get a failure message saying that the drive couldn’t be unmounted, try reformatting the drive first as ExFAT using Disk Utility. Then start the process over again.

Can I Install Catalina On An External Drive

When the app is done, the installer is ready to use.