[tomfakes]

I think there are a few reasons

1. Mac UI looks good, browser fonts look good there too 2. A lot of open source stack developers use OSX as their dev machines, so the code has already been tested there 3. Since OSX is BSD, a lot of the same server code runs, and runs well on OSX, so demos can run well with everything hosted on the same machine without needing VMs or other tricks.

Windows can do all of this too, but some stuff doesn't work as easily on Window. Microsoft server stack runs great on Windows, but 'the cool kids' are all running open source stacks.

[watmough]

Also, QuickTime player has a feature right on the file menu to do a screen recording.

http://i.imgur.com/JvmiM.png

I know there are other tools, but it's hard to beat built-in.

Regarding font rending, there's an old article by Joel:

http://www.joelonsoftware.com/items/2007/06/12.html

but the main point is this image. Take your choice.

http://i.imgur.com/qMmXt.png

[dadads]

I can say the same thing (open-source stacks) about Linux, and not many Linux demos are out there

[tomfakes]

Almost no-one uses Linux as their desktop. A lot of the UI tools don't work as well on Linux, or have no Linux versions at all.

[alecbenzer]

I always use Linux as my desktop - never touched a Mac except for when I use my brother's mbp and I only use windows for gaming. (though to be fair I am considering finally venturing into mac-land and getting a mbp for myself).

[CyberFonic]

An exception to prove your rule: I use Linux on all my desktops and servers. MacBook and iPad for demos and on the road. So yes, for those who watch my demos and presentations, they'd think that OS/X is the way to go.