Setting up a Mac as a server on your network!
If you want to use a Mac over the network or for speeding up rendering, you might want to run it without anytime hooked up (no display or keyboard and mouse). The problem is that by default, when you start an iMac or a tower without a keyboard/mouse hooked up, it opens bluetooth setup, trying to find a wireless mouse/keyboard. It is possible to disable this, however, in the bluetooth preferences. You just have to uncheck "Open Bluetooth Setup Assistant at startup when no input device is present" in the Advanced section.