If your like me and have a spare monitor lying around after putting it away due to making an investment in a Mac then here's a way of making it useful.
Why extend your display?
Well I don't know if you are like me but I tend to use a lot of Finder windows besides my other Apps that I use such as Adobe CS, Microsoft Outlook, Safari, Firefox, iTunes, Mac App Store, Stuffit Expander and many more.
And this just clusters on my desktop. With having an extended display you can put all those Finder windows or specific Apps on the new monitor with out it being drowned by the other windows.
Unfortunately I cannot do it over Wifi like I can with my iPhone via AirDisplay so I will have to get the adapter.
Where do I start?
Well you need to find out what connection your Mac takes for external viewing. If you have one of Apple's MacBooks, you can probably take the DVI or Mini DisplayPort. And the same for the iMacs.
Then you need to find out what connection your other monitor can take. It can be HDMI, VGA, DVI, DisplayPort, MiniDisplayPort, Component Video etc.
I have a iMac 27 inch with Mini DisplayPort and my HP 21 inch monitor has VGA or DVI.
Go to Apple Stores Displays and Graphics page here. And you will find the various adapters for extending your Mac display.
You can get these adapters from any Apple Resellers such as the iStores or Select Incredible Connection stores or just search for it on bidorbuy.co.za
If you want it for HDMI or Component Video I suggest Google it and you will come across 3rd party manufacturers who make them but I don't know if it is worth it, it might be bad for video quality etc.
DVI or VGA?
A lot of reviewers have found that DVI video quality is exactly the same as HDMI(Not the audio). So DVI is the best bet. Unfortunately they didn't have it in stock when I went through so I got the VGA. I'll probably get the DVI next week or so.
R300 - R400
1. The adapter is really tiny. One end will have the Mini DisplayPort male end and the other will have the female VGA end.
You need a VGA cable(Male to Male) which you can get from any computer shop for R100 or less or more depending on the length you want.