The iMac is a line of personal computers produced by Apple that contains hardware with which the user can access the Internet. The iMac’s built-in Ethernet card allows the user to connect her iMac laptop or desktop computer directly to a wired network via an Ethernet cable. This card automatically starts at startup, and does not alter its functionality unless instructed to do. As with any electronic device, it is possible for the iMac’s Ethernet card to malfunction. In such an instance, it may be prudent to reset it. Tips Writer Bio