![]() ![]() Sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia -volume /Volumes/Untitled - /Applications/Install\ macOS\ Big\ Sur.app Select and copy the following (remember to replace "Untitled" with your disk name):.Go to your Applications folder and you should check and find an “Install macOS Big Sur” app.Quit the installer by pressing Command-Q.After the download is complete and the installer launches, DO NOT click the Continue button.Click on the Get button on the upper right, and the Software Update system preference will open.You need to click the tab to get into the Search for macOS Big Sur in App Store.To create a Big Sur installer, here is the details: Icon Daemon is right, but one thing has been missed - do not directly launch the installer after downloading. One the installer is downloaded, the same can be found under the /Applications folder with the name Install macOS Big Sur.app. If you wish to cancel the download, you can do so by clicking on the circular button with a cross shown just ahead of the progress bar. The Software Update preference pane would start downloading the installer. If the App Store app doesn't launch automatically, you can click on the View in Mac App Store button on the above webpage.Ĭlicking the GET button would automatically open the Software Update preference pane under System Preferences app.Ĭlick on the Download button to download the macOS Big Sur installer. You can also use this link to directly access the macOS Big Sur app on the Mac Appe Store: On your Mac, open the Mac App Store app, search for Big Sur and click on the Big Sur app to access the macOS Big Sur app page. ![]() ![]() You can download the official macOS Big Sur installer from Apple by using the following steps: See How to create a bootable installer for macOS for additional details. While in Terminal you will see exactly what it's downloading and see it's coming directly from Apple's servers.Īssuming it's going to create the /Applications/Install macOS Big Sur.app application bundle, you would then use the following command in Terminal to create the installer: sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia -volume /Volumes/MyVolumeĬhanging MyVolume in the command to the actual name of the volume of your USB drive been used for the installer. I chose 10 and it proceed to download the packages directly from Apple's servers. In Terminal I change directory to where I download the extracted macadmin-scripts-main.zip and executed is as: macadmin-scripts-main % sudo. Using the installinstallmacos.py python script from GitHub: Note that I did not completely download it as I already have the installer and no need for the to download it again at this point, however the fact that is was downloading the packages, including the biggest one which was 11.3G in size, I'll assume the script will finish correctly as this script has been available on the Internet and in use for some time now and ifs still being maintained. What I tried next was to use the third-party python script that downloads the various packages directly from Apple's servers and assembles them into the installer app. I got the same "Update not found" error message as with the other methods. I then tried using Terminal and the softwareupdate command: sudo softwareupdate -d -fetch-full-installer -full-installer-version 11.0.1 Using a clean install of macOS Big Sur and then attempting to download the macOS Big Sur installer on the running occurrence of it, I was unable to do it using the methods described in the answers by bmike and Nimesh Neema in this thread. How can I get ahold of the installer file? I'm finding that since this Mac is already upgraded, I can't download it again. How can I download the macOS Big Sur installer on a Mac which is already running Big Sur? ![]()
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