Unfortunately, users have reported that the App Store is providing them with a stub installer that downloads the files it needs during the installation process.It appears as though the full installer is only being provided to those on the latest version of Sierra 10.12.6 and users already on High Sierra 10.13.Open your Applications folder and select the 'Install macOS High Sierra app. Press Command+i on the keyboard and verify its size.If it's tiny (~20MB), you can either run it to install High Sierra and then redownload the installer or delete it, upgrade to the latest version of Sierra from the Mac App Store Update tab, then redownload the installer.Once you've verified that you have the full installer, launch Terminal from the Applications:Utilities folder.Execute the following command in the Terminal window replacing 'Untitled' with the name of your USB key. Downloading and using different Mac OS installers is very common for troubleshooting purposes, for IT staff and admins, and for tinkerers.Please note that before installing any system, you need to ensure there is sufficient space on your Mac.MacKeeper allows you to free up necessary gigabytes easily. You'll be presented with a list of bootable drives. Select the USB install key to begin.Please follow iClarified on Twitter, Facebook, Google+, or RSS for more Apple news, tutorials, and videos.
![]() Sierra Osx For Usb Mac OS Installers IsInstalling macOS the clean way (using a non-startup drive)Requirements to create a macOS High Sierra bootable USB driveCreating a bootable drive with a High Sierra installer is quite simple. Creating a bootable USB using the Terminal Requirements to create macOS High Sierra bootable USB drive Try MacKeeper now!It makes sense to create a bootable USB flash drive to install the High Sierra operating system if you want to quickly install it on several Macs without having to download the installer each time.It’s not hard at all, and in this article, we will guide you through: For this reason, you need an external HD that is at least the same size as your Mac’s internal memory External hard drive (optional): You need to back up your data to save your important files before installing the new macOS. Make sure the installer is fully downloaded (about 5 GB) Good internet connection: You need to download the macOS High Sierra installer from the App Store. Blank USB drive: You need a flash drive that has at least 16 GB of available storage space to create a bootable macOS High Sierra installer. Go to System Preferences → Time Machine3. One of the easiest ways to clean your Mac is to use an app such as MacKeeper that will easily and quickly delete all useless and duplicated files while keeping the useful stuff intact.After cleaning your Mac, it’s time to back up your important files.2. Obviously, you don’t want to install a new macOS and have tons of junk files and unused apps.Therefore, you have to delete all this junk before backing up your data. Back up your dataBefore backing up your data it’s always a good idea to clean your Mac first.Why? Well, your Mac might get slow due to system junk and other unneeded files. The drive needs to be blank. A window will pop up asking if you want this disk to be your backup destination6. Click on Select Disk and choose your external drive5. Note, when the installer is fully downloaded it will automatically launch so make sure to quit it The file named Install macOS High Sierra will appear in the Applications folder once the download is completed. Type High Sierra in the upper right search bar, and download the High Sierra installer Download a macOS installer That’s it, let Time Machine back up your filesFor a more detailed guide, check out our article on how to back up your Mac using Time Machine. Change the name of your drive to HighSierra.Note: Advanced steps mentioned below are intended for system administrators and experienced macOS users who know how to use the Terminal command line. While an SSD would be a great option to create a bootable macOS High Sierra installer, a 16GB USB drive is enough as well.The system will automatically reformat the drive to make it compatible with a Mac. Alternatively, use this link to get the installation fileWhat’s next? Get an external drive you want to save the installer on. In this case, navigate to Purchased in the App Store and find the installer in the list ![]() After you see the process is done, quit TerminalCongratulations, now you know how to create a bootable macOS High Sierra installer using Terminal. Select Don’t use and the Terminal app will copy the installer to the HighSierra drive8. Next, you’re most most likely to be asked whether you want to use the bootable HighSierra USB drive for Time Machine backups. Terminal will erase your USB drive. You should receive a warning that your drive will be erased. Select Reinstall a new copy of macOS from the Utility window9. Within a few seconds, a macOS Utility screen should pop up7. Connect your macOS High Sierra bootable USB6. Hold down Command (⌘) + R to boot into recovery mode5. Click on Startup Disk and select the installer4. As you backed up your data, now it’s time to restore it. In other words, your Mac will be like a brand new computer with no apps, system preferences, user accounts, etc.You need to set up all these data all over again. Select your Mac’s internal drive, then click InstallThat’s it, all you need to do now is to wait for your bootable USB to install the new macOS High Sierra.Following these steps will install a new macOS. Mac for excelClick Show All Disks, then change the target drive for installation to either your extra drive or volume you just formatted6. Launch the installer and press Continue5. Download the High Sierra macOS installer as described in the Download macOS section above4. Choose the volume you wish to install the new macOS on and click Erase3. However, it can only be used if you have an extra drive or your main drive is divided into volumes.What makes this method great is that you don’t need a bootable High Sierra USB and you can simply use the installer from your startup drive and install the macOS on the extra drive.Moreover, this method won’t make you lose any data on your startup hard drive (except the volume or extra hard you will have to erase to install the macOS on).Here is a definitive guide on how to install macOS High Sierra on a non-startup drive:2. Clean install macOS High Sierra on a non-startup driveThis is a much safer and faster way to install a new macOS.
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