Useful guide to small laptops

I read the words but don’t understand. This Open Core Legacy Patcher of which you speak, is that a way to breathe life into old machines? Should I ask a tech to do it for me?

Assuming yes and probably (as I’m so dim as to have to ask these questions), do you think of this BB offering will require the same upgrade/conversion?

An old MB Pro would be handy for web surfing and music playing. Also, I have a circa 2010 iMac 27" that could be useful if updatable.