I am not a huge fan of Apple so I have not done a huge amount of work on their products. I do however backup and reinstall Windows OS for clients every week. And we dont lose any info.
I have a client with an iMac. The computer is horribly slow and no software tools I have used will fix it. The system is about 6 years old and running 10.11 I think it is.
So I am wondering if anyone can tell me the most appropriate way of backing up user data and then formatting and installing a fresh copy of the OS. The owner does not have any software discs for the computer. They do also have Office for Mac 2008. Is there a way of finding their license key and reinstalling that software. They are unable to purchase a new iMac so we are going to try refresh it.