How To Re-Install MacOS

Format the new USB flash drive as Mac OS Extended (Journaled) and label it “MyVolume”
Click the Mojave Download Link:
https://itunes.apple.com/us/app/macos-mojave/id1398502828?ls=1&mt=12
Download the installer package from the App store – it will land in the main /Applications folder.
Open Terminal and run:
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sudo /Applications/Install\ macOS\ Mojave.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume |
Full article at Apple Support “How to create a bootable installer for macOS”:
https://support.apple.com/en-us/HT201372
Big Sur Download Link:
https://apps.apple.com/us/app/macos-big-sur/id1526878132?ls=1&mt=12
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sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume |
Catalina Download Link:
https://apps.apple.com/us/app/macos-catalina/id1466841314?ls=1&mt=12
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sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume |
Mojave Download Link:
https://itunes.apple.com/us/app/macos-mojave/id1398502828?ls=1&mt=12
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sudo /Applications/Install\ macOS\ Mojave.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume |
High Sierra Download Link:
https://itunes.apple.com/us/app/macos-high-sierra/id1246284741?ls=1&mt=12
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sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume |
macOS Sierra 10.12 Download Link:
http://updates-http.cdn-apple.com/2019/cert/061-39476-20191023-48f365f4-0015-4c41-9f44-39d3d2aca067/InstallOS.dmg
OS X El Capitan 10.11
http://updates-http.cdn-apple.com/2019/cert/061-41424-20191024-218af9ec-cf50-4516-9011-228c78eda3d2/InstallMacOSX.dmg
OS X Yosemite 10.10
http://updates-http.cdn-apple.com/2019/cert/061-41343-20191023-02465f92-3ab5-4c92-bfe2-b725447a070d/InstallMacOSX.dmg
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