Autofill Not Working in Safari 11 Using High Sierra

If Safari 11.1 is installed:

AutoFill behavior has changed.

1. A user has to click inside the autofill fields, the arrow (interaction) for the autofill to work everytime.

Most of the time a popup will appear, click the username. Username will be entered.

Click the arrow button again. Again choose the username from the pop-up.

Password will be entered.

Some websites may require to enter username/password manually.

2. If the site is not a secure one, “Not Secure” or “Site Not Secure” will appear in the search field.

About AutoFill

This is a new security feature.

Safari Login AutoFill

Available for: OS X El Capitan 10.11.6, macOS Sierra 10.12.6, and macOS High Sierra 10.13.4

Impact: A malicious website may be able to exfiltrate autofilled data in Safari without explicit user interaction.

Description: Safari autofill did not require explicit user interaction before taking place. The issue was addressed through improved autofill heuristics.

https://support.apple.com/en-us/HT208695

Helps protect privacy by only AutoFilling usernames and passwords after selecting them in a web form field in Safari.

https://support.apple.com/en-us/HT208533

Site not Secure https://support.apple.com/en-us/HT208672

One more thing to try. Try the Safe Mode.

Safe Mode - About

Safe Mode Startup – El Capitan. also Sierra

If it works in the Safe Mode, try running this program when booted normally and then copy and paste the output in a reply. The program was created by Etresoft, a frequent contributor. Please use copy and paste as screen shots can be hard to read. Click “Share Report” button in the toolbar, select “Copy to Clipboard” and then paste into a reply. This will show what is running on your computer. No personal information is shown.

Etrecheck – System Information

See if anything here helps.

Safari 9 (El Capitan): If AutoFill doesn’t work

Safari 9 (El Capitan): Use AutoFill to enter contact info, passwords, and more

Try going to Safari/Preferences/Autofill to make sure everything is checked. Try unchecking the contacts and then checking it again. Click the Edit button to make sure nothing is excluded.