Apologies if this is a plainly ridiculous question as I am a novice with macs. My dad has an iMac 5 and recently bought the newest version of ipod nano. He isn't able to install the iPod due to needing a newer version of iTunes and isn't able to install a newer iTunes due to still using os x snow leopard 10.6.8. Is it possible to upgrade to el capitano or has the old iMac been left way behind? Seriously banging my head against a wall When trying to upgrade the os Apple tells me there are no new updates. Any help much appreciated!