Fixing electronics of any kind can seem difficult, and it is no different when it comes to Apple iMac computers. Fortunately, replacing an iMac power supply is a fairly simple task that can be performed relatively quickly with a little patience and the right tools. When searching for a new power supply for your iMac, it's best to first go to a local Apple retailer to inquire about obtaining a new power supply. Alternatively, most iMac power supplies can be purchased online at websites such as applecomponents.com or macproonline.com. This process doesn't require any advanced knowledge of computer repair, so it's a task that can be tackled by most people.