Cannot load any website in Safari

The best this computer can upGrade to would be macOS 11 Bug Sur

With the above information in-hand - follow this How to get old versions of macOS and verify what version this computer Qualifies to install.

Safari will open a redirect and open the Apple Store where the download can commence.

If Yes, suggest having at least 50 GB of Empty Space on the drive.

It will allow the Full Version ( about 12.xx GB ) to download, then expand and then commence to install.

If there is Third Party Security Software installed - remove it.

It will interfere with both the download and installation process.

The below links will help identify which version of macOS  this computer may Qualify to run.

macOS Big Sur 11 hardware requirements

macOS Catalina 10.15 hardware requirements

macOS Mojave - Technical Specifications

macOS High Sierra - Technical Specifications

Always make a Time Machine Backup  before doing any upGrades 

Other than the great advice from PRP_53...

Safari willbe the first browser in any OS version to go out of date.

Thanks to A Brody, Browsers by Mac operating system…

Browsers by Mac operating system - Apple Community

Not here using Wifi Hotspot, is taking a bit longer to login, maybe 5-6 seconds.

👍 :)

Thx

Off topic - ASC Forums Log in takes upwards of 4 - 5 minutes

Moving within is about the same

Wifi 6E with 500 / 500 Fibre Optic

And you ?

Long storey short

Full 30 sec shutdown of fibre optic router then cold boot

Seems to have fixed it, for now

Practice what I preach - to others 😔