And I bet you shutting down and turning on a computer on a daily bases would use more electricity than that.
Personally with my 2012 Mac Mini, I don't ever shut it down or Sleep it. She's running 24/7, except when I go on vacation and/or install software that requires a reboot.
I also use iStat Pro, available on both Mac and iPhone. Where I can monitor my Mac Mini on my iPhone anywhere I am at. If I see it using a lot of recourses. Because of a malfunctioning app. I then would use "Find My iPhone" and send it a shut down signal. It only has happened twice in the last year.
Some great feed back and advice here....
Macs left on sleep are fine. Infact we leave two in the office i go to some days on 24/7.
I may just do the same over busy periods, as I access it all hours anyway....
plus it will help Time Machien back ups stay fresh.
I will let you know if the prefs pane works..it may just have carried pver from my restart using time machine last week.
I would be very interested in where you found this "system pref." pane.
It doesn't appear on my iMac 27' and i'm using 10.8.5
I was wondering this myself....I just spent time looking for it, and didn't find it either. Leaving your system in Sleep mode overnight actually uses less power then the initial startup of turning it back on and off all the time. Actually it can burn up your power supply faster by the constant change in power needed when you first initially turn on your computer. The surge that everything requires during startup is very demanding on the electronics in the power supply. Leaving it on, keeps a few of these things with minimal power so when they do need to come back on, it isn't such a shock to the power supply. As far as power goes, when the computer is sleeping, it is using basically just enough to keep the RAM active so it doesn't loose data. As far as security goes, you can have your computer set to require a password as soon as the screen saver kicks on, in which case is going to be just as secure as if you turned it off. If someone knows your password to get in to your account, they are going to be able to get into it wether your system is off or on.
re: where I found this "system pref." pane
My old mac crashed iwth a screen failure a month ago, so i purchased a new imac 27'.
I reinstalled using Time Machine due to the masses of work on the mac, timekeeper, etc etcupdated OSX etc ...but had pref pane from before, which worked perfectly.
So perhaps this system prefs came along form my ld mac, to my new.
You can get it from here though as i found this last night.
Try this out guys
let me know how it goes
I'm really not interested in worrying about how to turn the sound off, it doesn't bother me, sure it is loud, but I don't actually turn the computer off that often to worry about it, and when I do hear it, there is so much going on around here you hardly hear it. I was just curious about finding it so that if someone asked, I would know where to send them. I will hear that sound maybe once or twice a month, basically just when I need to restart the computer or if I have to shut it off for some reason.
The preference pane comes from a third party free app called Startup Sound which must have been downloaded and installed previously.
As I mentioned above, this app no longer works in Mountain Lion.
SORRY Andrew, I didn't see that you had already put a link to the Arcana website.
Message was edited by: Ian R. Brown
C F MacBlob gave the correct answer though he threw us off the scent when he said it wouldn't work with Mountain Lion.
Psst DOES WORK WITH MOUNTAIN LION
I downloaded it from here https://www.macupdate.com/app/mac/16780/psst and can confirm it works on my 2008 Core 2 Duo 2.8 GHz iMac running OS X 10.8.5
The app lets you either completely mute the chime or set its volume at any level you wish.
I set it very low so that I can just hear it but it doesn't attract attention or wake people up!
The creator does say that it may not work with every Mac or configuration.
Do you have external speakers connected via the headphone jack? If so, unplug them, then go to sound under preferences, then output sound, and reduce the internal speaker sound to 0. Now plug your speakers back in and you're good to go!
Credit goes to this article: