In some trickier network situations, you may be assigned an IP but need an entirely different IP address to access certain network resources, but how on earth do you have two IP addresses at once? Create an IP Alias! It’s easy to do with the Mac OS X command line utility ifconfig.

Type the following at the command line prompt to alias the new IP of 192.168.0.101 to your existing subnet mask
sudo ifconfig en0 alias 192.168.0.101 255.255.255.0

If you want to get rid of the alias, just type:
sudo ifconfig en0 -alias 192.168.0.101

Need to know the meaning of a word, and quick? Easy, bust open Spotlight with Command-Spacebar and type in the word – one of the top results will always be the definition right out of Apple’s built in Dictionary file.

I’ve been bored with the standard Mac OS X boot up screen and it’s grey Apple logo, and a few times I have scoured around trying to change it manually to no avail. Today though, I stumbled into a post on The Unofficial Apple Weblog that makes changing the Mac OS X boot image a snap with a nice little program fittingly called BootXChanger. With this app you can change the image to basically anything you want as long as the background color is the same shade of grey. If you want the retro look, it’s easy to get that, or if you want to design your own little boot logo that’s fine too.

Download BootXChanger
BootXChanger homepage