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BumpAlarm is a program that uses the motion sensors in Apple's new Powerbooks to trigger various actions when motion is detected. It can be set it to automatically play a sound file, send an email alert, or run an applescript.

By enabling MacOSX's password-protected screensaver, you can hide BumpAlarm so nobody knows it's running.

Set BumpAlarm to run an AppleScript when it detects motion and the possibilities are limitless. Here are a few ideas…. make the Finder beep incessantly, send an automated alert to someone with iChat, or take a picture or record video with iSight.

BumpAlarm, requires Amit Singh's amstracker utility, more...

What's New

Version 09:
  • Fixed memory leak.
  • added custom about window.
  • loop checkbox now saves state in preferences file.
  • adjusted range of sensitivity slider.
  • interface improvements (Thanks Paul!)


Mac OSX 10.3 or later, Amit Singh’s amstracker utility, available here.

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Current Version (0.x)


Downloads 7,877
Version Downloads 6,950
License Free
Date 10 Apr 2005
Platform OS X / PPC 32
Price Free
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