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Reboot your Mac, and hold down the Option/Alt key on the keyboard until the macOS Startup Manager Screen appears. Make sure that the bootable macOS High Sierra installer you just created is connected to your Mac, whether it’s a USB flash drive or an external hard disk. Step 3: Erase and Reformat the Mac’s Boot Drive
When you’re done with steps 1 and 2, you can proceed to the scary part - erasing and reformatting your Mac’s boot drive. We just published a step-by-step process for creating your bootable macOS High Sierra installer using this free application, so take time to read the process and to make your installer disk However, there’s an easy way to do this step, and that’s to use DiskMaker X 7.
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You can create a bootable macOS High Sierra install disk by knowing just what Terminal commands to use.
Step 2: Create a Bootable macOS High Sierra Installer Remember, your Mac will be completely erased and if you have not copied your information to another location, you will lose it. Now, what kind of backup to you want to do? A Time Machine backup of your entire system is quite acceptable, or you can use an app like Carbon Copy Cloner or SuperDuper! to create a bootable clone of your Mac.įor those really important files, such as important documents, photos, videos, and so on, you may want to make a separate backup onto other media or to a cloud service like iCloud Drive or Dropbox.ĭo NOT go further without making a backup.
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It’s very useful to also have copies of all of your license information for Mac apps, since those that require a license or activation will need to be set up after your clean install. In addition, be sure that you know all of your online account passwords and logins - for this, a password manager like 1Password can be very useful. Make sure that you have access to all installation media for your apps (developer websites, Mac App Store, DVD or CD), and it’s a good idea to make a Note of all apps that you wish to re-install. Clean installs are also useful if a software or system software update has somehow trashed your existing operating system or if you have replaced a hard drive.īe sure you have plenty of time available to complete the complete install, as it can sometimes take as much as a day to go through all the steps.Īs noted, we’re going to completely erase everything on the Mac. In many cases, a clean install can improve the performance of a sluggish Mac. The idea behind a clean install is to start with a completely bare machine, getting rid of any old data, files, preferences, settings, old drivers, apps you no longer use, and so on.
#Osx high sierra usb how to#
In this post, we’ll describe how to do a clean install of macOS 10.13 High Sierra.īefore we get started, make a decision as to whether you want to do a regular update or a clean install, because a regular update is much easier to perform than a clean install. What’s a clean install? That means that the hard drive is erased completely and reformatted, which removes not only the current Mac operating system but all data, files, applications, you name it… Just think of it as a brand new computer having the operating system installed on it for the first time.
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A popular feature of its latest version, Mac OS X, is a desktop interface with some 3-D appearance characteristics.Sometimes it’s a good idea to do a clean install of a new Mac operating system version. MacOS High Sierra Download: is the computer operating system for Apple Computer’s Macintosh line of personal computers and workstations. MacOS High Sierra 10.13.6 is a powerful OS X release from Apple with numerous enhancements and a bundle of powerful tools. Download MacOS High Sierra v10.13.6 free standalone offline image installer.
A Mac OS DMG file allows you create bootable USB installer from Windows PC. Ways to download macOS full offline installer DMG &APP for Catalina (10.15), High Sierra (10.13.6), and Mojave without App Store. What should i do? How can i download full installer. I want to download full installer and then make a bootable USB from it to update my all 4 MacBooks.
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It currently have Mac Os X Yosemite.I want to download Mac Os High Sierra.When ever i tried to download it from app store, it just download a 19.9MB file instead of 4.80GB. I have Purchased macbook pro mid 2014 13' today.