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

learn more… | top users | synonyms (3)

0
votes
1answer
27 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
26 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 ...
1
vote
0answers
55 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
36 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
44 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
0answers
91 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
130 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 ...
3
votes
3answers
84 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 ...
0
votes
0answers
55 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
39 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
105 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 ...
0
votes
1answer
37 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
vote
2answers
966 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 ...
1
vote
0answers
379 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
94 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?
1
vote
1answer
58 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 ...
1
vote
1answer
147 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 ...
0
votes
0answers
824 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 ...
3
votes
2answers
672 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 ...
0
votes
0answers
322 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 ...
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 ...
2
votes
1answer
2k 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 ...
0
votes
0answers
165 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 ...
2
votes
1answer
69 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 ...
1
vote
1answer
47 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
56 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
275 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 ...
3
votes
3answers
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?
5
votes
1answer
915 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 ...
1
vote
1answer
618 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
26 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 ...
0
votes
2answers
355 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
62 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
673 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 ...
5
votes
1answer
2k 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 But still if I close the cover of the Macbook Pro ...
0
votes
0answers
71 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 ...
1
vote
0answers
73 views

MacBook Pro Fails to Sleep Properly

I have a MacBook Pro 17" (late 2009 model) 2.8ghz Core2 Duo running MacOs 10.8.4 which has developed a problem going to sleep which I've been trying to isolate for the past several months. Here is one ...
0
votes
0answers
141 views

How to diagnose an SMC in bad state?

I'm experiencing arepeated application(s) crashes on a mid 2010 MacBook Pro (6,2) running Snow Leopard (10.6.8). I don't have any of the symptoms described in the Apple KB: Intel-based Macs: Resetting ...
1
vote
1answer
749 views

How to keep monitor off when logging in remotely

I'm managing an 8-core mac server (fully updated to Mac OSX 10.8.4, all other software is up to date). Multiple users can login remotely to use the machine. Whenever someone logs in remotely, the ...
1
vote
2answers
373 views

Is there any way to ignore a heat sensor on a macbook pro?

I recently replaced the ribbon cable which connects the top case assembly on my macbook pro 4,1 (early 2008). My keyboard is now working but unfortunately the fans are reving up to 6000 rpms and ...
1
vote
0answers
48 views

How to diagnose/fix error when booting a G5

I have an Apple G5 and it won boot anymore. When I boot my fan starts to spin like a madman and the screen stays grey. When I try to boot in Safe Mode using Shift-Command-V, I get the error message: ...
0
votes
0answers
342 views

How to select which disks are allowed to sleep?

There is an option "Put the hard disk(s) to sleep when possible" in Mac OS X's preferences: Is it possible to configure which disks Mac OS X can put into a sleepy state? For example, I want to ...
1
vote
2answers
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 ...
2
votes
1answer
580 views

OS X Mountain Lion: Change resolution automatically when on battery

I have a rMBP running OS X 10.8 Mountain Lion. I normally use the display at a 1680x1050. Is there a way to have the display automatically change resolution to the default retina when on battery, and ...
2
votes
2answers
355 views

Mac wakes on scheduled power event that recreates itself every day

At 2:14 every morning, my Mac wakes. Looking at the logs, I see it's a scheduled event, but nothing shows up in System Preferences > Power. When I go to terminal, and run pmset -g sched, I see ...
-1
votes
1answer
204 views

How to avoid a forced shutdown or crash when the MagSafe is plugged in and got loose?

The new MagSafe for the current Macbook Air isn't very strong for its magnetic force, so it can become loose easily. Today I left the Macbook Air unplugged and it went into sleep, and after I plugged ...
0
votes
1answer
158 views

What are some effective ways to save power when using my MacBook Pro?

I have an Early 2011 MacBook Pro (Core i7, 8GB RAM) with Mountain Lion (OS X 10.8.2). What are some effective ways to save power? I am looking to maximise use of the battery - from a full charge - on ...
2
votes
1answer
275 views

During an iTunes sync, are MacBooks prevented from going into sleep mode?

I want to know this as I sometimes leave my iPhone unattended while syncing and I want to make sure that there's no cut off to the iPhone sync.
0
votes
1answer
417 views

Macbook Pro Mid 2010 not powering up after smc update

Macbook Pro Mid 2010 after SMC update 1.7 shuts down and now by pressing power button front light turning on for a few seconds, optical drive makes it's usual noise but no activity on monitor happens ...
3
votes
2answers
4k views

While my MacBook sleeps, the network drops off?

I have just moved over to a Macbook Pro from my old Macbook. Thanks to the Migration Assistant, it was an easy task, but I am now having an annoying issue: I have both computers on with all the same ...