New Patreon Tier and Early Access Content available. If you would like to support AVForums, we now have a new Patreon Tier which gives you access to selected news, reviews and articles before they are available to the public. Read more.
The iMac isn't user upgradeable except for RAM. If its out of warranty and you want to upgrade the HDD then there are a few guides available around the 'net - something I really should get around to doing too. But there's nothing else you can upgrade.