Putting a device into a low-power mode where only RAM is powered to conserve power at the expense of time to resume operation

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59
votes
7answers
72k views

Is there any way to set a MacBook Pro to not sleep when you close the lid?

The most common use case I have for this is when I'm playing music over AirTunes, but don't want an open laptop laying around. Or when I'm syncing or downloading something. This isn't the same as ...
58
votes
7answers
45k views

Why won't closing the lid sleep my MacBook Pro with external monitor attached after upgrading to Lion?

Up until yesterday (with Snow Leopard), closing the lid would cause my MacBook to sleep whether or not the external monitor was connected. Since upgrading to Lion last night, closing the lid when the ...
46
votes
6answers
34k views

“powerd” process uses a lot of CPU

Oftentimes, after I wake my Mac from sleep, powerd (which is the power management daemon? Which in particular deals with sleeping the Mac and waking it?) uses high CPU, usually around 25% to 50% on my ...
45
votes
3answers
60k views

How can I keep my Mac awake AND locked?

I want to leave my Mac awake overnight so it syncs 4GB of data from Dropbox. I need to prevent the machine from going to sleep because that pauses the Dropbox sync I've been using Caffeine to keep ...
43
votes
3answers
209k views

Using The Terminal Command to Shutdown, Restart and Sleep My Mac?

I'm getting more interested in using Terminal as an alternative way to address solutions on my Mac. I have seen this question entitled "Is there a better way to shutdown/restart OSX?". I would ...
35
votes
7answers
18k views

Bluetooth Issues after Sleep in OS X Yosemite (10.10)

I seem to be having persistent issues with Bluetooth connectivity, especially after waking up my Macbook Pro from a long sleep. I have a speaker that automatically turns off after a certain period ...
31
votes
5answers
24k views

Possible to run scripts on sleep and wake?

MacBook Pro 2010 running OS X Lion. Is it possible to run scripts on sleep and wake events? My specific application is that I've got Dropbox-synced Truecrypt volumes that I regularly use on both my ...
30
votes
13answers
19k views

How can I sleep the display from Terminal?

I'd like to be able to turn my screen off from command line. I know there's the keyboard shortcut ctrl+⇧+⏏ but I want to do it from a shell script or remotely. Is there a way?
27
votes
7answers
27k views

MBP Lock screen hotkey without sleeping?

I'd like to press a key combo to get my computer to the lock screen. In Windows the shortcut was Windows key + L. On Mac I press CMD+ALT+Power which turns the laptop off and puts it into sleep. I want ...
25
votes
3answers
55k views

Wake Other Computers from Mac OSX

Is there a terminal command within Mac OSX that will allow me to use WOL (Wake On LAN) to wake up other computers? Windows has wolcmd, is there an equivalent within OSX? I am trying to wake a ...
22
votes
5answers
43k views

How to add hibernate mode to MacBook Pro

I have recently switched to Mac from Windows hence I do not have much information. I want my Mac to go to safe sleep state on closing the lid. I also need an extra option available somewhere which ...
21
votes
2answers
82k views

How can I turn off a Mac's display without sleeping the Mac itself? [duplicate]

Possible Duplicate: Is it possible to put the display to sleep without putting the whole computer to sleep? I have an iMac, and sometimes I want to play some music over night, without the ...
20
votes
4answers
13k views

how to find out the start time of last sleep

Is there a command to find the date and time at which a Macintosh computer last entered the sleep mode?
20
votes
7answers
90k views

Put the display to sleep without putting the whole computer to sleep?

I like to use vnc on my ipad on my bed. I want the mac to go to a black screen so I can fall asleep while using the ipad, and not have to get up to shut down the mac afterwards. Is there anyway to ...
18
votes
4answers
13k views

Delay in keyboard responsiveness after wake with Mountain Lion?

After upgrading to Mountain Lion, now when I open the lid to my 2010 13" MacBook Air, there is a 3-5 second delay between when the screen powers on and when the keyboard will respond to key presses in ...
17
votes
3answers
39k views

What are the “sleepimage” and “swapfile” documents?

I was using Disk Inventory X and found a file called sleepimage in /private/var/vm/ It takes up 4 GB! I also found numerous other files in the same folder called swapfile0 swapfile1, etc. What are ...
17
votes
2answers
48k views

Keep wi-fi connection while asleep?

Right now my MacBook Pro is set to go to sleep after 1 hour and then when I wake it back up, I have to wait for it to find/connect to Wi-Fi again. How can I maintain the Wi-Fi connection so when I ...
17
votes
2answers
3k views

When woken up from sleep, some Chrome windows are blurry

I have a 2nd monitor attached to my Retina MBP. I was on OS X Mavericks and had this problem, where sometimes the displays would go to sleep and when I wake them, many tabs within Chrome look blurry ...
16
votes
2answers
8k views

Mountain Lion sleeps too aggressively

For me, Mountain Lion always seems to sleep whenever there is no user action, even when the computer is still doing something. In my case it always sleeps in the middle of running a batch operation in ...
15
votes
5answers
11k views

Is a 3-5 second delay normal for a Retina MacBook Pro to wake up from sleep?

For 3 days, I now got a new rMBP. I am a first time Mac user. I had a friend with a MBP and it usually wakes up in a mere second, as soon as he opens the laptop's lid up. However in my Retina MBP, it ...
15
votes
2answers
17k views

Upgrade to El Capitan, unable to use keyboard and trackpad after sleep

I have upgraded from Yosemite to El Capitan. This version is stable enough but when I let my macbook pro 15" (2013) sleeping at night and reopening at the morning, keyboard and trackpad do not work ...
15
votes
2answers
36k views

Random Restarts with “Sleep Wake Failure” error on Mavericks

When I leave my Mavericks OS X MacBookPro idle for a while, very often it will crash and reboot by itself. After reboot, the Problem Report dialog will show up, telling that "Sleep Wake Failure ...
14
votes
4answers
12k views

Why won't my MacBook Pro automatically sleep?

I have my MacBook set to go to sleep after 2 minutes while on battery (via the Energy Saver preference pane.) However, when I leave it idle, it only turns off the screen—it does not actually sleep. ...
13
votes
7answers
16k views

Waking display from terminal, general waking

This is a two part question. A practical, "how to" question is first, and then I ask for configuration suggestions. First, I put my displays to sleep at night, and I would like to be able to wake ...
13
votes
4answers
7k views

Schedule multiple wake up times for Mac?

I have systems running Mac OS X 10.5.8 and 10.6.8 that I would like to schedule some cron jobs for with the Cronnix GUI application. I prefer those computers be asleep until the scheduled jobs start. ...
13
votes
1answer
809 views

MacBook Pro won't wake up when stacked on another sleeping MacBook Pro

I noticed a really weird behavior on my MacBook Pro today. I have two of them at work, a 13" late 2011 (which I don't use often), and a 13" early 2011 where I put a SSD (which is my main computer). ...
13
votes
4answers
10k views

My Mac mini's computer name keeps changing when it resumes from sleep

When I wake my Mac mini from sleep, it occasionally comes up with a dialog saying "The name of your computer "whatever" is already in use on this network. The name has been changed to "whatever (1)"" (...
12
votes
7answers
15k views

Keyboard shortcut to sleep a Mac

I am looking for a quick way to sleep without closing the lid, or using the mouse. If it matters, I have Lion version OS and a MacBook Air.
12
votes
5answers
15k views

Mountain Lion aggressively hibernates

Recently, my MacBook Pro (mid 2012, 15 inch, 10.8.2) has started going into what seems to be hibernate mode after several hours asleep, whether it's plugged in or on battery. When I unplug it, it ...
12
votes
1answer
16k views

How to make a Mac (Macbook Pro) not hibernate?

I have already set in the Energy Saver of System Preferences that Computer sleep: on Battery Power, Never when plugged in, Never so if I close the cover of the Macbook Pro running ...
12
votes
4answers
3k views

Why does my MacBook Pro take so long to go to sleep?

My Macbook Pro takes an awful long time to go to sleep when I close the lid. Considering that I generally want to close the lid and then carry it somewhere, I want it to be fully asleep so I don't ...
12
votes
3answers
10k views

Retina MacBook Pro takes a long time to wake from sleep

So here's the thing. The rMBP is on Mountain Lion with all possible updates. When I open the lid I can see the login screen just fine but it is unresponsive for several seconds, can't enter my ...
12
votes
2answers
16k views

How do you change the behavior of the power button in Lion?

On my Macbook Pro, whenever you press the power button it goes into sleep mode. How do I change this to do nothing?
12
votes
6answers
28k views

How to disable Clamshell mode in Yosemite?

I have my Late 2013 Retina MacBook Pro attached to an external display. I use both displays. At night, when I leave my computer, I want to close the lid to put the Mac to sleep. Since Lion, there is ...
12
votes
8answers
2k views

Mac Mini 2011 - monitor wakes up messed up

I have an Mac Mini from 2011. Sometimes (I would say 80% of the time) when I wake up the monitors, after they've been sleeping, my main monitor (a Benq G2220HD 22″, connected via DVI → Mini ...
11
votes
3answers
37k views

How to stop MacBook Pro (Retina) from freezing/locking at the login/authentication dialogue, after wake?

Steps to reproduce: Be doing anything Close the lid of the computer Wait around for a while Open the lid of the computer Login prompt for last logged in user appears, battery and time MAY update, ...
10
votes
11answers
91k views

MacBook fans are running high even under normal load

My MacBook (non-pro) Aluminum is a few years old. Lately I experience the problem that my fans are running high even with moderate usage and the body really heatens up. It did this before, but only ...
10
votes
2answers
6k views

Will I damage my HDD if I transport my MacBook in sleep mode?

Is it safe to carry MacBook with HDD in a bag while it has been put sleep? I.e. I know there are some risks of hard disk drive damage if one tries to shake them or rotate them while they're working. ...
10
votes
2answers
897 views

How effective is Deep Sleep Mode?

I got frustrated from turning on my Retina MBP and waiting a few seconds while the systems loads from Deep Sleep Mode. I disabled it using sudo pmset -a standby 0 However, I would like to know what ...
10
votes
5answers
12k views

Why does my Mac take a long time (30+ seconds) to find my home wifi?

I have a retina MacBook Pro 15" running Mac OS X 10.9.4. When I wake it from sleep at work, it's connected to the wifi network before I've even entered my password. But at home, with a Airport Extreme ...
10
votes
2answers
5k views

How to fix DNS resolving issues on Mountain Lion after waking from sleep?

After I installed Mountain Lion the other day I've noticed something very annoying. Almost every time I wake my iMac (27", mid-2010, CI7) from sleep: it seems that something DNS-related is broken. ...
10
votes
2answers
3k views

Mac Pro loses network connection after wake from sleep since Yosemite upgrade

I have a really strange issue since i updated to Yosemite. When i wake up my 2012 Mac Pro, the network connection is totally lost. Output from dmesg (sorry, couldn't copy/paste at this time): - Nic ...
9
votes
8answers
53k views

How do I prevent my MacBook from sleeping when downloading apps from the App Store

When I try to download large apps from the App Store whether on battery or AC power the displays turns off after time set and downloading also stops. The Energy Saver preferences are set to defaults....
9
votes
6answers
5k views

How to prevent Mac sleep from command line?

I have a long running script at the remote computer. I don't want terminate my ssh session, and need enter it into a shell script. How is it possible to prevent my Mac from falling into sleep from ...
9
votes
3answers
356 views

Harmful to never put to sleep / shut down a mac?

Is it harmful for a mac in any way to never put it to sleep, or to turn it off? I have a macbook air and an iMac that I set to never sleep in the settings. Only the displays go to sleep. I turn them ...
9
votes
4answers
3k views

Schedule a Mac to sleep, just one time

Is it possible to schedule a Mac to sleep just one time? I know I can set a schedule for it, but I want to have control over it. So occasionally I'll go to bed but leave a file transferring, and I ...
9
votes
3answers
36k views

How do I require password prompt EVERY time I close my MacBook's lid?

This doesn't seem to always work. Also (perhaps related?): when I close the lid of the laptop when it's connected to the Thunderbolt display, how do I make the display go black? Basically, I am ...
9
votes
3answers
3k views

Can I configure my Macbook to unmount all external drives when I close the lid?

I have a new 13" Macbook Pro running Mavericks. This computer is connected to an external USB drive which I use for my Time Machine backups and for external storage Time Machine backups occur a few ...
9
votes
2answers
18k views

Why Does My iMac Wake Itself Up?

I have an early 2009 24" iMac. Lately, when in sleep mode it will occasionally wake up for around ten seconds with the screen off, then go back to sleep. Wake on LAN is turned off so I can't figure ...
9
votes
6answers
89k views

How often should one shutdown a Macbook instead of just closing the lid?

I have found contradictory opinions on this. Some say Windows users tend to shut down but that it is not necessary, and I tend to do that too. Others say it is preferable to shut down, as it does not ...