Over the past few weeks I’ve measured the EMF levels of various Apple devices using a hand-held RF field strength meter. (It measures frequencies from 50MHz to 3.5GHz). I measured EMF levels of an Apple iPhone, iPad, Mac Mini, iMac, Apple Airport Base station, Apple LCD display, and Apple bluetooth keyboard and mouse.
I noticed when watching movies on my 27 inch iMac that they are too dark. There are a lot of details in the blacks missing compared to watching on a DVD player. Then at church for some reason our macbook air that’s hooked up to a projector plays movies that are very dark too. Turning the contrast or brightness up doesn’t work as it just washes out the black. But you can change the color profile in the preferences control panel to fix this up.
When you plug in a second monitor to Macintosh computer, it may display an exact copy or ‘mirror image’ of what is on your first display. This is called mirroring. This is fine if you are doing a presentation and you want to see on your laptop screen exactly what is on the projector, but it’s not very useful at home to have the same thing on both screens. If you’d like to see different things on each screen, so the second screen gives you more desktop space, you need to turn mirroring off. Here’s how.
This is an Apple display adapter. They come in various shapes and sizes. The left hand end plugs into you laptop. There are 5 different possible left hand ends you can choose from: MiniVGA, DVI, Mini-DVI, MicroDVI and MiniDisplayPort! You’ll need to match it to your macbook. The right side plugs into a data-projector or monitor – there are 3 different right hand ends to choose from, VGA, DVI or HDMI. You’ll need to match this to your projector. If you always carry around the adapter to connect your mac to a VGA projector, that should get you out of trouble 99% of the time. If you want to be 100% sure, carry an adapter to connect to DVI as well.
I’ve had a few people ask me how I did the screen casts for Dragon Dictate. I used a program called iShowU HD. It costs $29 and you can get it from here. You can also use it to turn a keynote presentation into a Quicktime movie and avoid the sync problems of Keynote’s built in export movie command. Continue reading »
All macs that have a built in display also have a ‘video out’ port. It will look like one of these: