hi

Here are the upgrade instructions for the three most recent versions available for the Mac systems back in that range. You’re going to need to provide more specific details on which Mac and which part of 2010, or you can skim the following three articles yourself for that:

How to upgrade to OS X El Capitan - Apple Support

How to upgrade to macOS High Sierra - Apple Support

maybe How to upgrade to macOS Mojave - Apple Support for one system with specific graphics hardware...

Did it never cross your mind to actually include some information in your question.

What macOS would you like to install.

And what exact model and year of mac do you have.