Can a Mac last 10 years?

This means that in general, you can expect at least 10 solid years of life from a Mac, barring any unforeseen hardware issues.

What are the system requirements for Mac OS X Mountain Lion?

Mac OS X 10.8 Mountain Lion is available for older systems that are not compatible with the latest version of macOS and requires the following: OS X Snow Leopard 10.6.8, Lion 10.7, or Mountain Lion 10.8 already installed

Which Macs are not compatible with mountain lion?

All earlier Intel-based Macs, as well as PowerPC-based Macs, are not compatible with Mountain Lion. Most notably, Apple does not support Mountain Lion on these Intel-based systems that support Lion:

Is it possible to run mountain lion on Intel processors?

Most notably, Apple does not support Mountain Lion on these Intel-based systems that support Lion: Unofficially, however, it is entirely possible to run Mountain Lion on many of these systems — albeit some with limitations — with hardware upgrades and/or software hacks. What is “AirDrop”?

What kind of Mac do I need to install the software?

You will also need one of the following Mac models: MacBook (Late 2008 Aluminum, or Early 2009 or newer) Any Mac that shipped with Mac OS X Mavericks or later will not be compatible with this installer.

https://www.youtube.com/watch?v=d86Sai9vtVo