Need advice on where to start updating software..
I have an old Mac OS X Version 10.5.8 Processor 2.66 GHz Intel Core 2 Duo
Memory 4 GB 1067 MHz SSR3
Serial #: W89186ZB0TG
The software has never been updated to my knowledge my parents had no idea how to keep it up to date and now it is very behind in updates I don't know where I should start every update I try says it doesnt meet requirements for update.. I need to know where to start.. Can no longer download anything because everything is updated for it. Need help ASAP as I don't have a lot of time to work on their computer.. Please if you know where I can begin let me know 🙂 Thanks