can't install microsoft 365

Try this end-to-end install path:

1. Restart the device, then sign in with the account associated with the Microsoft 365 purchase and select Install again.
2. If the install option is missing after signing in with a work or school account, go directly to the Microsoft 365 Software page and install from there. If the install option is still missing, the account may not have a license assigned.
3. If the installer downloads but does not run:
   • Wait until the download is complete.
   • On Mac, move the installer from Downloads to the desktop and launch it from there.
   • If it still fails, delete the installer, empty Trash, and download it again using Safari.
4. If the download keeps failing or stops partway through:
   • Verify the internet connection.
   • Pause other downloads.
   • Delete the partial installer and download again.
   • On Mac, in Safari go to Preferences > Security and make sure Enable Javascript is selected, then go to Privacy > Manage Website Data > Remove all, and try again.
5. Check that the device is running a supported operating system. Microsoft 365 or Office will not install on unsupported systems.
6. If an error message includes a Learn More link, open it and follow the specific troubleshooting for that error.
7. If standard installation still fails, use the offline installer. It can bypass proxy, firewall, antivirus, or internet connection issues during installation.

If the problem is on a Mac and the installer is stuck at Verifying or shows an unidentified developer message:

• Select OK, wait 10 seconds, and try again.
• Update to the latest version of macOS.
• Restart the Mac and try the installation again.

References:

• Download, install, or reinstall Microsoft 365 or Office 2024 on a PC or Mac
• What to try if you can't install or activate Office for Mac
• Error code 30015-1011 (1392) and 30015-4 (1392) when installing Office
• "Something went wrong" error when you try to start a Microsoft 365 app