How to create a bootable macOS High Sierra installer drive Put the macOS High Sierra installer on an external USB thumb drive or hard drive and use it to install the operating system on a Mac. Macworld also has bootable-install-drive instructions for: mac OS High Sierra (10.13) El Capitan (OS X 10.11) Yosemite (OS X 10.10) Mavericks (OS X 10.9). Sep 06, 2019 Select your new hard drive from the sidebar. If you don’t see it, go to View Show All Devices. Click the Erase button at the top of the window. Choose a new name for your Mac’s hard drive. Change the format to Mac OS Extended (Journaled). When the process is complete, press command+Q to close Disk Utility.
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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
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.
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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.
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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. 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.
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.
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.
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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There are plenty of ways to clone your older hard drive to your new hard drive. Laptop models - you may want to format and do the cloning process with the new hard drive inside of an enclosure before opening up your computer. If you purchased the Universal Drive Adapter, you already have the tools required for your laptop model computer. Tower models - you can install the hard drive inside of the computer without taking out the older one you will not require an enclosure. Note: Older Macs using ATA type drives may require you to configure the new drive as 'slave' using the drive's jumper(s).
After you install the new hard drive, you will need to boot to your old hard drive. If you have an external enclosure for the old hard drive, you will plug that in via Firewire or USB, (Note: USB is only a bootable option on Intel Macs) then turn on your computer while holding down the Option key on your keyboard. This will give you a boot menu that looks like the picture to the left. Click on your old hard drive to start the booting process, and your Mac will start up normally after that.
Formatting the new hard drive will be the next step you will need to take to add a volume to the drive. Here is an instruction guide for the formatting process. http://www.newertech.com/tech_support/manuals/HDDppcintelformat/HDDppcintelformat.php
There are many cloning programs out there. All are similar in cloning ability, but others may offer additional functions you may find useful. Some of the more popular ones are...- 1. Apple's Disk Utility (included with OSX, located in Applications > Utilities folder)
- 2. Bombich's Carbon Copy Cloner http://www.bombich.com/
- 3. Prosoft's Data Backup 3 http://www.prosofteng.com/ These three in particular are explained below.
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- 1. Select your new volume (indented) and click on the 'Restore' tab.
- 2. Drag your old volume to the Source field.
- 3. Drag your new hard drive to the Destination field.
- 4. Click the check box for 'Erasing Destination'.
- 5. Click restore at the bottom and it then will start copying over to your new hard drive.
- 1. Click on 'Show Backup Options' to expand the drop down menu.
- 2. Select 'Backup Type', then select 'Clone'.
- 3. Click the check box 'Do Complete Scan'.
- 4. Click on the '+' symbol under 'Sources' and select your old hard drive from the 'Devices' list in the Finder window.
- 5. Select your destination (your new hard drive) from the 'Devices' list in the Finder window.
- 6. To finish, click 'Start Now'.
- 1. Select your Source Disk (your old hard drive).
- 2. Select your Target Disk (your new hard drive).
- 3. Under cloning options, select Backup everything.
- 4. Just click Clone, and you're done.
To do this, restart the computer and hold the 'Option' key on your keyboard to load up the boot menu. You should see your old hard drive and your new hard drive as bootable drives. If you do not see the new hard drive, you will need to do the cloning process again. If you do see the new hard drive, click on it. Your Mac will boot into it and you will get your desktop. This will verify that your hard drive has cloned successfully. Before reformatting/erasing your old hard drive, you will want to verify the cloning processes was a successful, as well as being certain your new clone works exactly like your old hard drive. Be sure to include checking your applications, data files, etc.
Winclone is a program for cloning your Boot Camp partition. http://twocanoes.com/winclone/- 1. Select your Boot Camp volume as 'Source'.
- 2. Click 'Image...' at the bottom of the window. This will prompt you on where you want to save the image.
- 3. Save it to your desktop or an external hard drive.
- 4. Click on the 'Restore' tab, and select the image file you've just created.
- 5. Select the destination to be your new Boot Camp partition.
- 6. Click 'Restore'. It will start expanding & copying your Windows files to the new hard drive.
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