Safari with ?
About a week ago, I could no longer open Safari and there was a ? over it. I tried to search for Safari in Finder, but it isn't there. Anyone know what happened and how I can get it back?
MacBook Pro 15", macOS 10.13
https://support.apple.com/guide/mac-help/dock-icon-a-question-mark-mchlp1412/mac
1.Backup the computer
2.Reinstall macOS from Recovery.
https://support.apple.com/en-us/HT204904
Command (⌘)-R
Reinstall the latest macOS that was installed on your Mac (recommended).