Dec 12, 2017 Home Mac Recovery How to Fix Mac Not Detecting External Hard Drive in Sierra or High Sierra Summary: There are several reasons why your Mac won’t recognize external hard drive. If you are experiencing external hard drive not mounting in macOS Sierra or High Sierra, read on this post to get potential solutions to this problem. Format External Hard Drive for Mac. External Hard drives should be formatted before you use them as a Time Machine backup disk. That means the drive will be completely erased and set up for macOS. If you are using a new hard drive, it may already be formatted for macOS, but it. Installing macOS Sierra on the external drive 1. Preparing the hard drive for the installation Before you install macOS Sierra on the hard drive, you will need to clean the external device. Ensure that there is no important data on your hard drive. Then plug it into your Mac, go to Finder and select Applications.
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.
![External Hard Drive For Mac High Sierra External Hard Drive For Mac High Sierra](/uploads/1/2/6/5/126541618/404497710.png)
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.
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
![External hard drive for mac high sierra mac External hard drive for mac high sierra mac](/uploads/1/2/6/5/126541618/923167080.jpg)
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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Apr 02, 2020 Apple Pages is a powerful word processor that gives you everything you need to create documents that look beautiful. And read beautifully. It lets you work seamlessly between Mac and iOS devices, and even work effortlessly with people who use Microsoft Word. Jun 25, 2019 MacOS sierra 10.12.6 Review. Sierra 10.12.6 is an amazing new existing operating system with advanced security features, it provides protection system integrity from various malware threats. Sierra includes many new features and numerous tweaks and various enhancements. With the great and incredible user interface, the users can work with great. Jul 19, 2017 The macOS Sierra 10.12.6 Update improves the security, stability, and compatibility of your Mac, and is recommended for all users. Enterprise content: Resolves an issue that prevents making certain SMB connections from the Finder. Sep 15, 2017 MacBook Pro (Retina, 15-inch, Late 2013), macOS Sierra (10.12.6), Pages 'Custom Templates' Posted on Sep 13, 2017 7:22 AM Reply I have this question too ( 3 ) I have this question too Me too (3) Me too. Oct 24, 2019 Mac mini introduced in mid 2010 or later iMac introduced in late 2009 or later Mac Pro introduced in mid 2010 or later. To find your Mac model, memory, storage space, and macOS version, choose About This Mac from the Apple menu. If your Mac isn't compatible with macOS Sierra, the installer will let you know. Pages for mac os sierra 10.12.6.
External Hard Drive For Macos High Sierra
I have always used a toshiba 1TB external hard drive (compatible for both windows and mac) for my photos and videos
Today when I went to add files to it (1st time since updating to High Sierra) it wouldn't allow me add files, giving me a 'circle backslash symbol'.
I went to 'get info' for the toshiba external hard drive and everything seems to be the same as always, along with 'read and write' under sharing and permissions.
I have never had this problem before, no other changes other than the update to High Sierra 10.13.1 (which was back in November )
I read where in the Mac Driver folder of the external hard drive you could install Tuxera NTFS for Mac, upon attempting this it stated that it wasn't compatible with the os system, however it was 2014 version.
Should I download Tuxera NTFS 2018? Os x download. Even then it is only a 15 day trial period, then will have to purchase. (from what I gathered)
I know my other option is to format the external hard drive to OS X extended (that would delete everything, so would require me to take everything off the external to format, then put it back? I'm not sure where I would relocate everything as far as having enough storage?)
Internal Hard Drive For Macbook Pro
Any help or advice would be greatly appreciated.
MacBook Pro, macOS High Sierra (10.13.1)
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