How safe is to leave Mac running all the time?

rhpenguin

macrumors 6502a
Jun 10, 2003
929
0
London, Ontario
Its completely okay.. Actually its better for the hardware to constantly be running (HDD aside). When you turn your machine on and off the parts inside heat and contract causing wear and tear and can cause premature failure.

The hdd constantly spinning can cause it to die quicker because of its moving parts, but thats what power management is for :)
 
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Hodapp

macrumors 6502a
Jul 10, 2003
579
32
New York, NY
I've been doing this with all of my computers for years. The only time I ever reboot my Mac is when security updates require it. The only thing you have to worry about is that if you live/work in a dusty environment where the computer is you'll need to blow it out with some airduster every once in a while so you don't burnt out any of the fans from dust buildup. :)
 
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Lacero

macrumors 604
Jan 20, 2005
6,639
2
I don't think leaving it on or turning it off makes any appreciable difference as to the components lasting longer. The only safe bet is you run up your energy bill.

If you are talking about being on a DSL or cable modem line, OSX and Macs are generally safe to be left on, if you have the firewall in OSX and on your router enabled. Sleeping Macs are safe.
 
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heaven

macrumors 6502a
Jun 20, 2004
553
2
boneca said:
The topic says it all. I usually keep my computer running always unless I have to restart it.

TAIA
I always put my powerbook asleep when I dont use it, so it runs 24/7... Didn't notice any problems so far.

Enjoy your Mac
 
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KCK

macrumors regular
Jul 31, 2003
121
0
Oakland, CA
Add another person to the list who leaves his computer on 24/7. My record for my old Quicksilver G4 is 125 days between rebooting ( yes I delayed installing a couple of security updates).
 
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heaven

macrumors 6502a
Jun 20, 2004
553
2
Apple Hobo said:
OS X also runs the daily/weekly/monthly cron scripts between 3:15-5:30 AM, so leaving your machine on 24/7 allows the OS to keep itself tidy.
To run them all when you want it to, type this in the terminal: sudo periodic daily weekly monthly
Type in your password and wait until it finishes!

Enjoy!
 
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heaven

macrumors 6502a
Jun 20, 2004
553
2
hughdogg said:
If the machine is sleeping, does it still run these scripts?

Thanks,
hughdogg
No, but you can also use them manually... see my previous post

More Info:

Periodic system maintenance is scheduled by 'cron' (see Week 33). Cron launches a program called 'periodic' which is responsible for launching the maintenance scripts.

% cat /etc/crontab
...
#minute hour mday month wday who command
# Run daily/weekly/monthly jobs.
15 3 * * * root periodic daily
30 4 * * 6 root periodic weekly
30 5 1 * * root periodic monthly
...

The daily script is run at 3:15 am.
The weekly script is run at 4:30 am Saturday.
The monthly script is run at 5:30 am on the first of each month.

Your Mac must be running (not sleeping) for these scripts to be run.

The output from these scripts can be found in:
% ls /var/log/*.out
/var/log/daily.out /var/log/monthly.out /var/log/weekly.out
 
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Peyote

macrumors 6502a
Apr 11, 2002
760
0
Leaving your Mac on 24/7 won't be a problem as long as you follow these three rules:





1) Never expose it to too much light.

2) Never get it wet. If you do, clones made by eMachines will appear.

3) Never, Never feed it after midnight. If you do, it will turn into a Dell.
 
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maxterpiece

macrumors 6502a
Mar 5, 2003
729
0
If i'm gonna be gone for more than 1/2 hour i sleep it. If I'm gonna be gone for more than 24 hours then I turn it off (if i remember). There's a HUGE difference in power consumption when you compare a sleeping computer with a powered on computer... and when you are starting a computer up it will use like 10x as much power as when it is fully powered on and just doing light work and like 100x as much as when it is asleep... just that 1 minute of startup time is like 2 hours of sleep time. Not to mention the hassle of waiting for the computer to boot and reopening your applications.
 
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clayj

macrumors 604
Jan 14, 2005
7,478
205
visiting from downstream
Peyote said:
Leaving your Mac on 24/7 won't be a problem as long as you follow these three rules:

1) Never expose it to too much light.

2) Never get it wet. If you do, clones made by eMachines will appear.

3) Never, Never feed it after midnight. If you do, it will turn into a Dell.
Is that midnight EST, or midnight Pacific time, or midnight Greenwich time? And it's always "after midnight"... it might be 23 hours and 59 minutes after midnight. ;)
 
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Peyote

macrumors 6502a
Apr 11, 2002
760
0
clayjohanson said:
Is that midnight EST, or midnight Pacific time, or midnight Greenwich time? And it's always "after midnight"... it might be 23 hours and 59 minutes after midnight. ;)

does that mean you always "let it all hang out"? Since it's always after midnight?
 
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dvdh

macrumors 6502
Apr 6, 2004
429
0
heaven said:
To run them all when you want it to, type this in the terminal: sudo periodic daily weekly monthly
Type in your password and wait until it finishes!
Or if you are worried about messing around in the console, you an download an app like Onyx to give a GUI interface for running your maintenance scripts. You should be able to find in on MacUpdate.com
 
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Jigglelicious

macrumors 6502
Apr 25, 2004
421
0
NYC
rhpenguin said:
Its completely okay.. Actually its better for the hardware to constantly be running (HDD aside). When you turn your machine on and off the parts inside heat and contract causing wear and tear and can cause premature failure.

The hdd constantly spinning can cause it to die quicker because of its moving parts, but thats what power management is for :)
Actually, you're wrong on that point. The HDD suffers the most stress from being powered on/spinning up. Constant spinning up/down can cause premature failure but usually just causes the drive to "whine" after a while. Like the rest of the computer, its best to leave it running 24/7, including the hard drive :)
 
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Peyote

macrumors 6502a
Apr 11, 2002
760
0
clayjohanson said:
Actually, it's "hang down":

"After Midnight" lyrics

And no, I'm not gonna do that... they're your rules, after all. :)

Actually they're the old Chinese dude's rules, applied to the context of Apple hardware, in a humerous manner. Thereby turning a pop culture reference into geeky Apple joke. :p
 
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Deefuzz

macrumors 6502a
Jan 27, 2004
904
65
St. Louis, MO
Peyote said:
Leaving your Mac on 24/7 won't be a problem as long as you follow these three rules:





1) Never expose it to too much light.

2) Never get it wet. If you do, clones made by eMachines will appear.

3) Never, Never feed it after midnight. If you do, it will turn into a Dell.
LOL, NICE! well done :)
 
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