Macs running Snow Leopard and earlier are no longer receiving updates from Apple. In light of this, we strongly recommend updating your Mac's software to a current version. Ars Technia does a great job explaining your options here.
I am an Apple Certified Support Professional with over a decade of experience supporting families, schools, and businesses. Tech has always captured my imagination, but it's not my only passion. I'm an ordained Anglican minister; Aeropress is a daily ritual of mine; I've driven across Mongolia; and I'm the father of three girls. I hope to provide for you a balanced and realistic perspective into the practicality of technology.