1. Mac App Interrupted Restart Error Message On Windows 10

For further reference, I've been in to each of the accounts on my iMac where I accessed Calendar, Notes, Mail, Safari, FaceTime, Messages, App Store, and Maps to help ensure that all of the 'new OS version' processes are completed.

If you've tried to use Boot Camp Assistant to install or upgrade to Windows 10 S, an error appears that says 'Windows could not parse or process the unattend file for pass [specialize].'

Your Mac might restart repeatedly as you click through the error messages.

Follow these steps to start up in macOS and begin the Windows installation again:

Mac App Interrupted Restart Error Message On Windows 10

1. Press and hold the power key on your Mac for a few seconds to shut down.
2. Wait a few seconds, then press the power key again to turn your Mac back on. Hold down the Option key immediately after turning on your Mac.
3. Release the Option key when you see the Startup Manager window.
   
4. Select the macOS startup disk, then click the arrow or press Return.
5. Open Boot Camp Assistant and click Continue.
6. Click Restore to remove the existing Boot Camp partition.
7. Start the installation process again using Windows Home or Windows Pro instead of Windows S.