Need help upgrading browser on Mac Pro 2012

The Mac Pro “cheese grater” pedestal computers from 2012 top out at macOS 10.13, or macOS 10.14 if equipped with specific Metal-capable graphics controllers.

You’ll need to find a long-term support browser that still works that far back. (e.g. Firefox extended support release)

Or port a web browser back to that version yourself, which will usually be a project.

If you’re more tied to the “cheese grater” hardware than to macOS, you can install Linux, or BSD, or such.

SSL to TLS:

In June 2015, Researchers at standards organizations formally declared that Secure Socket Layer (then SSL 3) Internet Encryption was not nearly as secure as was thought, and needed to be replaced. SSL Versions 1 and 2 had already been deprecated by that time,

Early versions of Transport Layer Security (TLS) were already available in many Browsers. Over a remarkably brief period of time, sites tightened requirements for what was acceptable for encryption, and refused connections from browsers that could only offer SSL 3.

Apple issued Safari version 9 in 10.11 El Capitan version of MacOS, which included an early version of TLS encryption. Safari 9 was later provided by Security Update into the two previous versions of MacOS. 10.10 Yosemite and 10.9 Mavericks, PROVIDED you applied all available software updates.

MacOS versions older than those can not make secure [httpS:] connections on the Internet, because by 2016 standards, your proffered encryption (SSL) is considered inadequate.

Allan Jones wrote:

Is this a Mac Pro, a big expensive desktop workstation , or the MacBook Pro laptop shown in your equipment line?

I’m not sure I’d call a Mac Pro 2012 a desktop.

The whole desktop, maybe.

They do make a very solid footrest, in their usual under-desk habitat.

Don’t ask. 🤪

What MacOS are you running now?

Is this a Mac Pro, a big expensive desktop workstation , or the MacBook Pro laptop shown in your equipment line?