Re: launchd, periodic scripts, and a powered-down Mac

BakersT <> wrote:

> On 10.4.11 : I had been using 'Anacron' for a long time before seeing
> something to the effect that 10.4.8 included a change that would allow
> launchd to "catch up" to periodic scripts that didn't run because the
> system was down (or maybe just sleeping?) at the appointed time.

That would be consistent with my observations on 10.5 and later. If the
computer is sleeping when launchd is scheduled to run something, it
catches up after the computer wakes up.

launchd does not run anything which was missed due to the computer being
shut down at the scheduled time.

> I've removed Anacron, and "sudo launchctl list" shows that the
> daily/monthly/weekly scripts are scheduled, but they're not executing. Is
> that 'cuz my machine is normally powered-down (not just sleeping) when
> they're scheduled to run (default times, between 01:00 and 03:00 IIRC)?

Yes.

> Should I return to Anacron, or am I missing something? (And yes, I -do-
> want to power-down each evening, and I'd prefer not to have to remember to
> manually run the maintenance scripts.) Cheers...

Anacron would be one solution.

Personally, I'm perfectly happy to let my computers sleep overnight.
Modern Macs use very little power when asleep. They use less when shut
down, but it is still not zero.

--
David Empson

In article <1j8eexm.1lt4vknxlkpvvN%>, David Empson
<> wrote:

> Modern Macs use very little power when asleep. They use less when shut
> down, but it is still not zero.

the difference is negligible.

nospam <> wrote:

> In article <1j8eexm.1lt4vknxlkpvvN%>, David Empson
> <> wrote:
>
> > Modern Macs use very little power when asleep. They use less when shut
> > down, but it is still not zero.
>
> the difference is negligible.

Indeed. When I measured a mid 2007 iMac, it used about 2.5W sleeping,
1.5W shut down.

My older PowerMac G4 QuickSilver 2002 wasn't that good: about 13W
sleeping, 6W shut down.
--
David Empson

David Empson <> wrote:

> nospam <> wrote:
>
> > In article <1j8eexm.1lt4vknxlkpvvN%>, David Empson
> > <> wrote:
> >
> > > Modern Macs use very little power when asleep. They use less when shut
> > > down, but it is still not zero.
> >
> > the difference is negligible.
>
> Indeed. When I measured a mid 2007 iMac, it used about 2.5W sleeping,
> 1.5W shut down.
>
> My older PowerMac G4 QuickSilver 2002 wasn't that good: about 13W
> sleeping, 6W shut down.

I measured my late 2006 24" iMac at 5W sleeping, 4W off.

A Windows/Linux box of slightly older vintage custom built from
components I measured at 13W off, but my notes say 6W of that was the
speakers.

I haven't gotten around to measuring this new 27" iMac, but Apple claims
1.75W asleep, 0.83W off.

Hmm. I think I see a pattern for the Macs here. Looks like sleeping adds
about a watt compared to off.

--
Richard Maine | Good judgment comes from experience;
email: last name at domain . net | experience comes from bad judgment.
domain: summertriangle | -- Mark Twain