I installed the update to Mavericks a few days ago, and while it's mostly been great there is no longer a sound that goes with the low battery warning. I have several programs which suppress the visual notifications, which makes for very unpleasant interruptions when the machine goes into standby.
I contacted Apple support about it and they said that there is no way to add a sound to the notification using settings available in the operating system. They suggested I use a 3rd party app, but although I have found some which offer low battery pop up windows, I'm having trouble finding any offering an audible alert.
Best Answer
You could write a short script and run it via cron every couple of minutes.
Running the above will show your current battery usage. You can then parse it out and you can make it alert you with something like:
That will speak out "low battery power. Or to make it beep:
I have a desktop, so can't see the pmset output, a quick google shows something like this would do it:
You can put that into a cron to run every 5 mins or so.
To add this to cron to run every 5 minutes, do:
and type in a line that looks like this:
Then save and exit. The crontab editor will be whichever is set as your default editor in $EDITOR. For me that vim, default OSX it's nano.
That lists out your crontab. For more info see: enter link description here
To use launchd, you'd be better off putting that into a shell script, then putting a launchd plist file in your ~/Library/LaunchDaemons folder. That's somewhat out of scope of this answer, Lingon is a great tool to control LaunchD files. See LaunchD for more information. You shell script would be be the same command as used above, with
as the first line. Save it somewhere, make LaunchD run it.