I'm running El Captain 10.11.6. I've recently tried to update to Safari 11 using App Store as I had done in several other machines with the same setup. Safari 11 downloaded fine but something went wrong during reboot and I ended up reinstalling El Captain 10.11.6. Now I'm back to Safari 9 but App Store thinks that I've already installed Safari 11 and so no longer offers Safari 11 as an update.
I assume that this will fix itself if and when a new release of Safari 11 comes out.
Can I fix this otherwise in the meantime?
cat /Library/Receipts/InstallHistory.plist | grep -i safari
<string>com.apple.pkg.Safari10.0.1ElCapitan</string>
.