Every physical interface of a computer has an associated MAC address which is a unique identifier. A MAC address is different from an IP address and is used for network access control and monitoring of network connectivity, such as applying MAC filtering on your Internet router to only allow specific machines to connect to the internet via your router. However, in order to do any of this you need to know the computers MAC address. This article explains how to find the MAC address of your MAC OS X machine.
The hosts file is a text file that maps hostnames to IP addresses. Upon typing a url address in the browser, the system first checks if there is a relevant entry in the hosts file and if exists gets the corresponding IP address. If no entries exists it resolves the IP via the active connection’s DNS servers.
The hosts file can be edited to block certain hostsnames, like ad-serving/malicious hosts, or used for web development purposes, i.e. to redirect domains to local addresses.
This guide will walk you through the basic steps of creating an optimised screensaver for your Kindle. Aimed at the Kindle 3, the end results should look fine on Kindle DX or Kindle 2. The walk through uses Photoshop CS4, but any version of Photoshop should suffice.
In Mac OS X Lion (10.7), Apple has made the user Library folder hidden. Preferences, presets, and other user customisation settings are stored within this Library folder.
There are two ways to access this folder:
To keep the folder hidden and to access it sporadically:
- In Finder, choose Go > Go To Folder
- In the Go To Folder dialog, enter
- Click Go
To unhide the folder permanently:
- Open a Terminal session
- Enter the following command (replace <username> with your actual username
- Quit Terminal
chflags nohidden /Users/<username>/Library
If you have a bootcamp partition on your Mac, you may notice degraded performance on Mac OS X. This could be because spotlight tries to index the bootcamp partition.
Ever since I switched over to using a Mac, I’ve been struggling to find a really simple yet powerful blogging client. On PC platform nothing beats Windows Live Writer, it’s simple design with powerful editing capabilities make it a must for offline blogging. It also downloads your WordPress theme so that you can see exactly what your post will look like.
Quick post on how to take screenshots using keyboard shortcuts.
Save to File:
Take a screenshot of the entire screen and save it as a file on the desktop
Select an area and take a screenshot of that area, save as file on the desktop
CMD+SHIFT+4 followed by SPACE
Click on a window and take a screenshot of that window, save as file on the desktop
Save to Clipboard
Take a screenshot of the entire screen and save it to the clipboard
Select an area and take a screenshot of that area, save it to the clipboard
CMD+SHIFT+4 followed by SPACE
Click on a window and take a screenshot of that window, save it to the clipboard
The discussion of Aperture versus Shuttler Speed versus ISO are the fundamental basics for understanding photography. A thorough understanding of the relationship of all three are necessary to understanding exposure in digital SLR cameras.
This guide provides a simplified explanation of these terms and their effect on each other.