While bootable copies are best made on internal SSDs and HDDs, they can also be made from USB drives. Whether external HDDs or solid-state chip storage, you can use a compatible USB drive to install macOS. Related: How to Create a macOS Bootable Installer. Installing macOS on a USB Drive. Format your USB drive as APFS or JHFS+. In the Terminal Window, type diskutil list and note down the disk no. Of your USB 3.0.GB Flash Drive and your connected external hard drive or SSD Then download the EFI mounter app and double-click to open it Enter the password and double-click the drive number that you saw in the Terminal against your Thumb drive.
Have you ever thought of carrying your Mac OS on an external device and gain access to it at any time? If the reaction is yes, then you have arrived at the right post. We will be providing you with the information through which you can install macOS High Sierra on an external drive.
Part 1. How to Install macOS High Sierra on the External Drive
![External External](/uploads/1/3/3/8/133880669/204204915.png)
Before beginning the process, there are a few requisites that you must meet. You will need an external drive with a minimum capacity of 16 GB, and second, you will need the copy of the macOS High Sierra installer. You can obtain the installer from the App Store by searching for 'macOS' and download it to your Mac hard drive.
Step 1: Formatting the External Drive
To allow the external drive to function as the startup disk, you need to format it to Mac OS Extended and employ GUID partition map. Start the utility disk. You can find it under the Applications category or search it using Spotlight.
As utility disk runs in the background, you can check for the format of the external drive. In the following example, the drive is in Master Boot Record format. First, unmount the drive. After unmounting, you can select the same drive from the left of the window as shown in the figure below. Now, from the tabs that appear in right window, choose 'Erase' option.
In the next window, you can now format the external drive as 'Mac OS Extended' and opt for GUID Partition Map. If you choose to, you can also give it a name. Press 'Erase' to proceed. After completion, you will see the following screen. Press 'Done' to proceed.
Installing Mac Os On External Hard Drive
Step 2: Installing macOS High Sierra on the External Drive
After you complete the download of the macOS installer, double click the same from the Applications folder to begin the installation procedure. Press 'Continue' in the following screen.
Click 'Agree' to the accept license agreement. In the next window, press the 'Show all disks' option. The window will display the local drive and the connected external drive. Choose the external drive in this case. You will have to key in your system user name and password.
macOS High Sierra will begin installing on the selected external hard disk. It requires some time to complete the task. You can wait until the process is complete. Before it completes the installation, the Mac will restart. Therefore, it is preferable to save any other work that is in progress.
After restarting, the Mac will take a minimum of 15 minutes to complete the installation process. It will then reboot from the new device. Mac os x video card driver. You then have to proceed with the general process of activating Siri, time zone, and adding the user account. Once you complete these actions, you will possess the new version of macOS High Sierra on your external drive. Do not remove the external drive, as Mac OS will access the files on the drive periodically. You can now use the same every time you wish to use High Sierra.
Mac os single user mode mount drive. Reboot in Single User mode (Command + S) Enter the following commands, fsck –fy mount –uw / Create a directory to mount USB Drive. Mkdir /Volumes/usbmnt Before plugging in the USB Drive, get the list of 'disk' devices available by running the command. Ls -l /dev/disk. Plug in the USB disk. Aug 28, 2014 1. The name of the drive we want to mount (what do we call it?) 2. The type of file system that drive uses. The folder we are going to mount the drive in. First we need to enter Single User Mode. For Chameleon-type hackintosh bootloaders, hit any key then type –s enter. For legit Mac users I think you hold Apple and s key as you boot. How to mount USB or external drive in Single User Mode on Mac? Boot your Mac in SU mode by holding “Command+S” keys combination during startup. Let go off the keys when you see a black screen with white text scrolling. Wait for a few seconds until you see the last line written as “Localhost: root#”.
Mac External Hard Drive On Windows 10
Part 2. How to Use macOS High Sierra with the Bootable Hard Drive
As you now have macOS High Sierra in the form of bootable hard drive, you can use it with another compatible Mac or when the situation demands. However, remember that using the external device as a bootable drive will slow down the functioning of the system. More importantly, it is useful only when you are facing trouble with your existing internal drive of the Mac.
Bamboo wacom driver mac os x. The following information will be helpful in case if you choose to use macOS High Sierra with the bootable hard drive:
Step 1: If there is a trouble with the current hard disk, and you wish to solve it or use the new version of the OS, then plug the bootable external drive to the Mac.
Encrypted hard drive mac os. Step 2: Power on the machine and hold the option button until you notice the recovery screen appear. From the screen, you can choose the bootable external device that you have created.
Step 3: You will boot into the macOS High Sierra version for that particular session.
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