If the volume has a different name, replace MyVolume in the command with the name of your volume. Type or paste one of the commands below Each command assumes that the installer is in your Applications folder and MyVolume is the name of the USB flash drive or other volume you're using. Open Terminal, which is in the Utilities folder of your Applications folder. Enterprise administrators: download from Apple, not a locally hosted update server.ĭownload a macOS installer using the App Store or your browser Use Terminal to create the bootable installer Your Mac must also be compatible with the macOS that you’re downloading. To download a full installer, your Mac must be using macOS High Sierra or later, the latest version of macOS Sierra or the latest version of OS X El Capitan. What you need to create a bootable installerĪ USB flash drive or other secondary volume with at least 14 GB of available storage, formatted as Mac OS Extended You don’t need a bootable installer to upgrade macOS or reinstall macOS, but it can be useful if you want to install macOS on multiple computers without downloading the installer each time, or you’re unable to install a compatible macOS from the Finder or macOS Recovery. Mac, open Safari go back to the App Store High Sierra page and see if it now says 'Get'.These advanced steps are primarily for system administrators and other experienced users who are familiar with entering commands in Terminal. If you have found any of those or one and you have moved it to the Trash and emptied the Trash, restart your If you find a folder named like that, check the date that it was downloaded corresponds with yesterdays date then move it to the Trash, empty the Trash. One more thing is to look inside your /Library/Updates folder, to find this folder click on Finder in the Dock,Ĭlick on View in the menubar and select Go To Folder, enter this text,Ī Finder window will open with the folder Updates highlighted, have a look inside for any folder that is titled using numbers in a string of 3 numbers then a string of 5 numbers or something similar. If you see Install macOS High Sierra.app appearing there, click and hold on it till it wiggles, then click on the small 'x'that appears. do you have the Install macOS High Sierra.app icon in your Dock.Īnother thing to try is opening Launchpad, it should be the rocket icon in your Dock and in your Applications folder, If you find anything move it to the Trash,Įmpty the Trash. Ok so open your Applications folder and check again for anything that could be related to the High Sierra installer,įor instance Install macOS High Sierra.app or anything High Sierra related. How to create a bootable installer for macOS – Apple Support Have the Install macOS High Sierra.app in your Applications folder, and a 16GB USB stick named MyVolume, then follow the instructions here on how to create the bootable USB installer. It is also possible to make a bootable USB stick with the High Sierra installer on it. It is a good idea to keep a copy safe on an external drive should you ever need to reinstall macOS High Sierra (saves having to go through the painful download process or having to access the unreliable Apple Recovery Servers) or want to install it on another mac you have. When the download has completed and you have confirmed it is 5.23GBs in size then please make a copy of it for safe keeping, As I say the one in the Applications folder will self delete after you complete the installation. And also make sure the iMac is connected to your router via cable and not WiFi. Restart your mac and go back to the App Store and try the download again, make sure the App Store says 'Get'. Ok on your iMac you have macOS High Sierra.appdownload, as you can see it is only 415kbs, move it to the Trash and empty the Trash. If you have downloaded it to your laptop and installed it the Install macOS High Sierra.app self deletes after installing, whereas you could have just made a copy prior to installing so that you could move it over to your iMac. Wish you had told me you were trying to install macOS High Sierra on two different macs.
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