So I have stuck with my "if it ain't broke, don't fix it" Mac OS Snow Leopard 10.6.8 despite all the offers to upgrade it for free.
I am starting to get messages now that existing software won't work or be updated unless I upgrade, so I fear I may eventually have to bite the bullet and upgrade (or buy a newer Mac).
The first thing to find out is if your Mac can run mac OS Sierra.
Apple hasn’t published this information on its website yet, but during the presentation of the new operating system at the World Wide Developer Conference in June, a slide revealed the following compatibility information: This is simple, for the most part, with the exception of exactly what “Late 2009” means.
Following are some answers to the most frequently asked questions about upgrading to mac OS Sierra.
The upgrade install process lets you install Mountain Lion over your existing version of OS X, and still retain all of your user data, most of your system preferences, and most of your applications.
You may lose some of your apps if they can't run under Mountain Lion.
The first thing you will want to do is find out exactly which version of the Mac operating system to install and make sure that there is no reason not to install it.
You can read all about the latest version of Mac OS, along with details of the latest point updates and any known issues, here: Mac OS Sierra latest news: current version, updates, betas, and new features.