Questions about with tracking and reducing power-drain for computers or devices.

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1
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2answers
1k views

MacBook Pro Mid 2009 does not boot without resetting system management control (SMC)

Today i started my macbook pro and after some seconds it stopped working (just turned). I was not able to start it again. After some apple support search I found a page that described how to reset the ...
3
votes
1answer
305 views

iMac sleeping even when set to never sleep

Running 10.7.5, I've got a fairly new iMac (6 months old) 27", set to never sleep, yet when I got in to work this morning it was asleep. How to fix this? Output from pmset -g in Terminal: Active ...
3
votes
4answers
114 views

Is there a way to shutdown mac when screen is turned off?

I have a mac mini, which is connected to a TV using HDMI cable. TV & mini are connected to separate power source, so that I can shutdown TV and mini independently as required. Primary use of mini ...
1
vote
1answer
117 views

Is my SMC damaged?

I have a Macbook Pro running 10.9.3 (13D65), Boot ROM Version: MBP55.00AC.B03 SMC Version (system): 1.47f2 The fans are always running at full rpm and the kernel task used to take up 90% of the ...
0
votes
1answer
41 views

Is it possible to “shut off” battery charging in OSX [duplicate]

Is it possible to "shut off" battery charging in OSX with an application rather then physically. Could this be done with AppleScript (I doubt it) or will need to be obj-c cocoa application? ...
0
votes
2answers
88 views

MacBook Pro Hibernates Straight Away

Whenever my Mac goes to sleep when its on battery, it straight away saves its contents to the hard drive and powers off, going into a deep sleep. This gets really annoying when I walk away for 10 ...
0
votes
1answer
93 views

Having trouble with a SMC reset

I'm having trouble with my built in iSight and I'm trying to reset the SMC. My MBP has a non-removable SMC, so the instructions ask me to press CMD-SHIFT-ALT-POWER at the same time, release it at the ...
3
votes
2answers
24 views

Is there a way to tell which OS X processes are using the most power over time? [duplicate]

My Android phone comes installed w/ an app that graphs out power usage of various components over time, so it's clear that the screen is the biggest user, followed by the phone, followed by Facebook ...
1
vote
1answer
111 views

How to add sites to the Safari Power Saver exclusion list?

In Safari, a feature I really like is that flash plugins are automatically blocked by default and you have to click in order to start the flash plugin (see, e.g., ...
2
votes
2answers
200 views

SSH to Macbook works when lid closed (and plugged in to power)

I noticed that my PuTTY session to my MacBook (which is now on Mavericks 10.9.3) seems to stay alive with the clamshell closed so long as the power cable is plugged in to the laptop. This can be seen ...
3
votes
4answers
1k views

Is InsomniaX working on Mavericks?

It seems to me that InsomniaX, a utility to let a MacBook stay awake when the lid is closed, is not working on Mavericks. Can anyone confirm for me?
0
votes
2answers
7k views

Have to reset the SMC on Retina Macbook Pro very often

Very weird problem. About 3/10 times the discrete GPU on the Retina MBP (Nvidia GT650M) does not engage when I launch a game. The performance for the game drops to as if only the integrated GPU was ...
6
votes
5answers
6k views

kernel_task consumes 500% CPU on AC power, sometimes

Typically, my kernel_task process uses 1-4% CPU and 100-700MB of memory. However, sometimes when I have the power adapter plugged in, the CPU usage jumps to around 500% (8 cores) and stays there until ...
1
vote
1answer
109 views

Can an Apple Time Capsule be used to store/watch movies on iPads in a car?

I have a 2TB time capsule. I am driving from PA to FL with 3 kids. I have a hundred of so movies/TV shows stored on a 2TB Time Capsule. Can I use a power converter in my minivan to power and use ...
2
votes
3answers
1k views

How to keep Mac alive during internet connection/download

Since version 10.8.1, my Mac cancels the wifi connection and switches to standby mode, despite download. I can remember that the one advantage of the mac was that i don't have to do anything for ...
0
votes
1answer
71 views

Loading gif and progress bar on start up

After doing a pram and a smc reset my late 2011 mac book pro 10.8 shows the apple logo on a grey screen with a loading gif and a progress bar which once finished the mac just turns off. I have got ...
0
votes
3answers
5k views

How to fix my MacBook Pro that goes straight into sleep/hibernate?

I have a MacBook Pro (mid-2009) that I just installed Mountain Lion on. After the install everything appeared ok, but a day later it goes straight into sleep/hibernate whenever I turn it on. This ...
2
votes
2answers
3k views

Difference between autopoweroff and standby in pmset

I just got a new Retina MacBook Pro 15". After getting some downloads interrupted due to the computer going to sleep (even on AC power), I started looking at the man page for the pmset command. I did ...
0
votes
1answer
125 views

Reset SMC: Can I use “SMCFlasher.efi -reset 1”?

I'm in a situation where I don't have working internal shift+ctrl+alt-keys and thusly unable to perform SMC-reset. Related to others' issues with SMC-updates, there are instructions for re-flashing ...
0
votes
0answers
46 views

How to check if SMC is functioning OK?

Is there a way to check if the System Management Controller (SMC) is working with no issues on MacBook Pro 13' Early 2011? Can I run selective Apple Hardware Tests to check only specific hardware ...
3
votes
0answers
330 views

How to know if the System Management Controller (SMC) has been reset?

I've recently uninstalled Fan Control, and one of the steps of the uninstallation is that I need to reset the SMC. So I've done that according to the instructions from the Apple website, however how ...
0
votes
0answers
73 views

I need EFI Firmware and SMC for Macbook Late 2009 (6,1)

Like from title. I need to reinstall SMC and EFI Firmware for Macbook Unibody White Late 2009 (6,1), but I don't find the EFI and SMC for my model on Apple Support page. Where can I find them ?
0
votes
0answers
110 views

External drive remain in stand by after Wake up

I have a WD My Book external drive connected to my iMac 27" via USB 3.0 The drive is initially in a stand by mode (drive doesn't spin, it's visible in disk utility). Now when backup script starts, it ...
2
votes
1answer
3k views

MacBook Pro not responding to power button

My Mac wont start up even with full battery and charger plugged in... There is no sound, no screen or any disk movement. The same thing also happened a few weeks back and when I took it to the repair ...
2
votes
0answers
156 views

MacBook Pro 5,1 will only turn on after SMC reset

Resetting the SMC every time the machine is turned off is the only way to turn it back on and when it is on the fans run at max speed etc. etc. (SMC issues). Have tried to swap out HDD and RAM. ...
2
votes
1answer
439 views

How much power can be drawn from the lightning connector by a external device?

How much power can be drawn from the iPhone/iPad lightning connector by a external device? Update: The use case is a audio-related device for iPhone/iPads. It would require around ~100 mA at 3,3 ...
0
votes
0answers
88 views

iMAC 20-inch - Early 2008 - Brightness automatically dims, no settings to prevent this

My display automatically dims itself after a while and it's really annoying. Of course I tried to search for a solution, but I've got no options like the answers say. They mention "Energy Saver", and ...
1
vote
0answers
65 views

Does APNS work over LTE, or only UMTS/GSM and WiFi?

Over at Android Enthusiasts, we are having a discussion of what's more battery-life efficient — having APNS over GSM or UMTS networks during sleep, as TS4264 appears to indicate (thus ...
1
vote
1answer
192 views

High Perf GPU notification on Mavericks

With OS X Mavericks, users are able to use Activity Monitor to view which apps are using the High Perf GPU, therefore, sucking more power from the battery. This is exposed by the 'Requires High Perf ...
5
votes
1answer
1k views

What do the “Energy Impact” numbers displayed in the new OSX 10.9 mean and how are they calculated? [duplicate]

I love the new energy tab in OSX 10.9 mostly because I love data about my machine. I'm curious how the energy impact is calculated, and what the number represents. It seems clear from using the OS ...
0
votes
1answer
40 views

Energy saver 101 : sleeps after or when battery is at x hours?

Using Mac OSX on a macbook pro. in energy saver - battery tab : if i have sleep at 1 hour, does that mean the computer will sleep after an hour on battery OR when there is a about an hour of battery ...
1
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0answers
470 views

MacBook Pro will boot only after a SMC reset

I replaced the hard drive in my MacBook Pro (mid-2010) with a SSD one. I installed Mac OS X 10.9. At first the installer wasn't able to find the new SSD drive, because of a error: "SerialATAPI device ...
0
votes
0answers
98 views

Mountain Lion OS: disable the power management/power save mode for the wireless nic

I've been using Macbook Pro and 10.8.5 Mountain Lion OS. My question is : Is it possible to disable the power management/power save mode for the wireless nic in os x?
4
votes
2answers
1k views

What is the difference among the various event schedulers for OS X / Darwin?

I'm confused about the differences among the three (that I know of) tools for scheduling running of code on OS X / Darwin: cron launchcd pmset I understand that cron is largely deprecated, but it ...
1
vote
1answer
191 views

Can I configure a task to run while my MacBook lid is closed?

Can I use pmset or a utility like Power Manager to have a task (such as an arbitrary script or backup) run at a specific time while my Mavericks MacBook Pro's lid is closed? Are there perhaps pmset ...
1
vote
1answer
73 views

What could be preventing my backup script from running?

I'm having trouble getting a simple backup script to run. The following script runs most of the time, but occasionally it fails entirely (without printing out any log information). Is there something ...
0
votes
0answers
1k views

What are the different sleep modes on Mavericks MacBook Pros?

I'm confused about the different sleep modes on Mavericks MacBook Pros: PowerNap, App Nap, DarkWake, sleep, system sleep, display sleep, standby, hibernation, etc.? What do these terms mean and how ...
0
votes
0answers
461 views

Repeated Kernel Panics & Freezing on Late 2012 Mac Mini 6,1. Help please with the Log

I've had massive problems with my Mac Mini recently. It has been freezing and rebooting after around 10 to 50 minutes use. It's a Late 2012 Mac Mini 6,1 with 8gb of memory. The problems got worse ...
2
votes
1answer
85 views

How to pesistently configure a Macmini4,1 to boot after power failure?

I do have a Macmini4,1 (2010) and I want to use it as a server so it will always start even after a power failure. Please remind that I am running Ubuntu on it, not OS X. Still, based on what I ...
0
votes
0answers
9 views

iMac 27″ (2013) is shut down but fan run at full speed [duplicate]

I have this 'fan runs when I power down the iMac' issue with my 2013 27″ iMac purchased in January. My iMac has worked flawlessly until yesterday, after a few days ago I started to use the USB hub ...
0
votes
0answers
184 views

MacBook Air (11-inch, Late 2010) SMC Firmware Update 1.8 Won't install

I am running 10.8.5 OSX with late 2010 MacBook Air 11-inch. I have had the "MacBook Air SMC Firmware Update 1.8" in my updates window now for at least a few months. I constantly hit update, and it ...
1
vote
1answer
66 views

Does setting the Computer Sleep setting to 'Never' prevent sleep?

I'm running OS X 10.8 Mountain Lion on several servers. We're about to ship them off to a colo provider, and I wanted to prevent them from sleeping. My question is, does setting the System ...
0
votes
1answer
70 views

delay after opening lid display dark until key pressed

okay so my MBP Mid 2010 was took a little tumble (it was in a felt sleeve which was inside a backpack) today and since has been acting weird. when i open the lid, the login screen does not come back ...
0
votes
0answers
281 views

My MacBooks don't give low power notifications with Mavericks

I upgraded 2 MacBooks to Mavericks recently. Everything was OK for a week, then I started to experience power failures at low batteries on both of them. Looks like as if OS regularly 'forgets' to ...
1
vote
1answer
799 views

Mac doesn’t go to sleep after inactivity

Before updating to Mavericks, my Mac would go to sleep after 15 minutes of inactivity, which is usually 10 minutes after I turn the screens off using Shift+Ctrl+Eject. However, since the update, the ...
0
votes
0answers
29 views

Is there a way to recognise active applications that are not being used so a script could shut them down?

Is there a way to recognise active applications that are not being used so a script could shut the down? I'd like to recognise an application that is running but has not accepted keystrokes recently ...
1
vote
1answer
231 views

How can I restart on a schedule, if network users are connected?

I want to schedule a nightly restart of my OSX media server, but I routinely have other machines in the house connected to this machine remotely (since it's also our TimeMachine system, iTunes ...
0
votes
2answers
504 views

Macbook Pro is unresponsive for about a minute when waking up. Is this normal?

Whenever I wake up my 2012 Macbook Pro after it's been asleep for a few hours, the screen turns on, but it is unresponsive for about a minute. During this time, the mouse cursor does not move at all ...
2
votes
1answer
68 views

Stop auto-dimming automatically

I've noticed my Mac didn't retain the brightness I set with the keys. How do you stop it from auto-dimming?
1
vote
1answer
855 views

Macbook air wouldn't turn on until after I reset the SMC. Does this indicate any further problems?

I put my macbook air to sleep this afternoon by closing its lid, as I usually do. When I got home a few hours later it wouldn't turn on and didn't respond to the power button being hit. I followed ...