If your Mac’s fan seems to run constantly, is very very loud, and seems really hot, you should probably have it serviced. However, occasionally some Macs are afflicted with a loud fan noise for no apparent reason. The fan runs and runs very noisily, blowing cool air. This is most probably just a glitch and you may be able to fix it yourself quite easily.

To attempt this quick fix, shut the Mac down, and then unplug it from the wall AC power. If it is a Macbook with a removable battery, remove the battery. Wait five minutes and re-attached everything. If you’re lucky, the fan problem may now be fixed! If that does not work, you may need a firmware update from Apple in order to fix the problem. Go to this Apple page and see if they have an update for you.

You can now pre-order Mac OS X Snow Leopard online. The pre-order price is $29 for a single Mac, or $49 for a family five-pack. Many people expect the software to ship in September of 2009, but no official date has yet been announced.

This upgrade version is only available for Macs currently running Leopard. It will only install on Intel-based Macs.

You can give your Mac hard drive come breathing room by relocating iMovie footage to an external firewire hard drive.

When you first started using your shiny new Mac, you thought the hard drive was so large you would never run out of storage. Then you started using iMovie for video, and now your Mac hard drive is almost full. Fortunately, you can free up lots of space on your Mac hard drive by moving iMovie video footage to an external hard drive. Dragging the video files in Finder will not work - doing this properly is a two-step process.
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If you have switched from a PC to a Mac, you are no doubt pleased with the enhanced stability of the platform. No computer is perfect, however, and sometimes you need to terminate a program that is not responding, even on a Mac. But where is CTL+ALT+DEL?

On a Mac, if you need to quit any application that is not responding, click Option+Command+Esc. This brings up the Force Quit menu, which lets you quit any application that is not responding.