website loading problems since updating to Catalina 10.15.3

Go step by step and test.

1. Restart your Router.

      Start up in Safe Mode. https://support.apple.com/en-us/HT201262

      Launch Safari and test.

      Restart normally by clicking the “Restart” button at the bottom.

  2. Launch Safari holding the shift key down and test.

3. Check for adware. 

      Run  the latest release of Malwarebytes for Mac to remove malware/adware, if installed on your Mac.

      For instructions:  Install Malwarebytes for Mac          Uninstall Malwarebytes for Mac

      Click the “Scan Now” button. Once done, quit Malwarebytes for Mac.

      Restart the computer and relaunch Safari holding the shift key down.

  4. If the steps posted above don’t help:

      Download EtreCheck: https://etrecheck.com/ and post the report here.

      Click, “Free Download” button and then  “Click to download” button.

      Open Downloads folder, click on it to open, and then select ”Open”.

      Click on the bouncing  EtreCheck icon in the Dock.

      “Choose a problem” from the popup menu box, and then “Start EtreCheck” in the dialog.

      Click “Share Report” button in the toolbar, select “Copy report” .

      Paste the report when you reply.

Are you running any anti - virus programs? Using a VPN?

Try setting up another admin user account in System Preferences/Users & Groups to see if the same problem continues. Please post back on whether or not this worked. Also try the Safe Mode. Please post back on whether or not this worked.

Isolating an issue by using another user account 

Couple times I experienced typing in a web site and seeing the URL indicating the proper web site even showing the lock symbol but the web page never loads and stays on previous web site. I have done a clean install of 10.15.3 on my 2019 MacBook Air. Don't know how much more stable it can be besides a clean install.

Hi,

try to download the combo update from Apple.

You do a new update and verify if it fix the problem, normaly i prefer combo update instead of delta, it's hevier but he do his job better.

Good luck