Since iOS and iPadOS can’t be installed via bootable USB, clean install generally refers to one of the two scenarios below.

You’re notified before an update is installed. When an update is available, iPhone downloads and installs the update overnight while charging and connected to Wi-Fi. Turn on Download iOS Updates and Install iOS Updates. Excel for Microsoft 365 Word for Microsoft 365 Outlook for Microsoft 365 PowerPoint for Microsoft 365 OneNote for Microsoft 365 Excel for Microsoft 365 for Mac Word for Microsoft 365 for Mac Outlook for Microsoft 365 for Mac PowerPoint for Microsoft 365 for Mac OneNote for Microsoft 365 for Mac Excel for the web OneNote for the web Excel 2021 Word 2021 Outlook 2021 PowerPoint 2021 Office 2021 OneNote 2021 Excel 2021 for Mac Word 2021 for Mac Outlook 2021 for Mac PowerPoint 2021 for Mac OneNote 2021 for Mac Office 2021 for Mac Excel 2019 Word 2019 Outlook 2019 PowerPoint 2019 Office 2019 Excel 2019 for Mac Word 2019 for Mac Outlook 2019 for Mac PowerPoint 2019 for Mac OneNote 2019 for Mac Office 2019 for Mac Excel 2016 Word 2016 Outlook 2016 PowerPoint 2016 OneNote 2016 Office 2016 Excel 2016 for Mac Word 2016 for Mac Outlook 2016 for Mac PowerPoint 2016 for Mac OneNote 2016 for Mac Office 2016 for Mac PowerPoint for Mac Microsoft 365 for home Office for business Office 365 Small Business Microsoft 365 admin Office 365 operated by 21Vianet Office 365 operated by 21Vianet - Small Business Admin Office 365 operated by 21Vianet - Admin Outlook for Mac 2011 Office app for iOS Outlook Web App Skype for Business for iPad More. On macOS, for example, a clean install is generally thought of as installing a new version of the Mac operating system from a downloaded installer file rather than from the App Store. Go to Settings > General > Software Update > Automatic Updates.

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