My mum's got an old Apple iMac from ca. 2009 which after 10 years is pretty much for it.
I'd like to wipe the computer to get rid of any personal data before we get rid of it. Just in case.
As an older machine, it's still running OS X Snow Leopard.
Unfortunately I don't have any of the install disks, because, well, I knew Mum was gonna get rid of the computer so I binned them when I was having a big sort out when I moved house. Call me stupid but I didn't exactly expect to need the install disk to uninstall it. But then I'd forgotten the old adage, if you want to lock yourself out of your house, make sure you keep your house keys with you at all times.