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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 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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BumpAlarm User Discussion

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Abates25 Member IconComment-3

More curiously, will this work with a MBP?!

Reply0 replies
Version 0.9
TheZee Member IconComment+0

Will this work with an iBook ??? Sounds like an awesome app. Please advise. Thanks. Peace out.

Reply1 reply
Version 0.9
shaunchu (Developer)

In response to the previous question, it should work fine with any computer with built in motion sensors. Please test it out and contact me if there are any incompatibilities. Thanks, -Shaun

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Current Version (0.x)


Downloads 7,804
Version Downloads 6,877
License Free
Date 10 Apr 2005
Platform OS X / PPC 32
Price Free
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