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

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7 views

SMC keeps needing to be reset because webcam keeps ceasing to be recognized

My embedded webcam stopped being recognized and I found a solution of resetting the SMC which worked. Problem is two days later I tried it again and it wasnt working so I had to reset SMC again. Any ...
0
votes
1answer
244 views

MacBook Pro late 2011 had GPU problems

I have a MacBook Pro late 2011 and yesterday my external screen suddenly showed glitches on the screen; much like the screenshots you see from other 2011 MacBook Pro's that have a failing GPU. As I ...
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2answers
2k 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 ...
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vote
1answer
4k views

How can I force my laptop to shut down when I close the lid?

I'd like my Mac laptops to shut down completely when I close the lid. This is partly for convenience and partly for security reasons. I couldn't find a way to do this in the System Preferences (OS ...
2
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1answer
236 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. ...
1
vote
1answer
70 views

MacBook Pro only boots to grey Apple screen with spinning loader

My MacBook Pro boots to the hated gray screen. Things I have tried to fix this include: Booting with CMD-R (boots to a grey screen) Resetting the PRAM (boots to a grey screen) Resetting SMC (boots ...
5
votes
1answer
7k 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 ...
1
vote
1answer
848 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
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0answers
708 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 ...
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1answer
22 views

Why does fan increase slowly its speed at boot and system is so slow?

I am given a MacBookAir5,2 [A1466 (EMC 2559)] that is very slow. To give you an idea, a sequence of: Power on Log in and loading the desktop Power off from the menu takes around 10 minutes. The ...
3
votes
1answer
207 views

Do Solid State Drives need Power Management? Do they need sleep?

Is there any positive (or negative) to checking the power management option "Put hard disks to sleep" when I only have a SSD drive installed? Is there any difference if I'm connected to another ...
3
votes
3answers
7k 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 ...
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votes
1answer
2k 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
1answer
263 views

Why Does My MBA Close All My Apps After 5 Mins Idle?

Sometimes if I walk away from my MBA without locking the screen and I return I'll be faced with a login screen. Once I login all my apps I had open are now closed. Sometimes I'll close my MBA lid and ...
2
votes
2answers
62 views

Don't Sleep Network Connection / VPN

If I let my computer sleep my VPN connection seems to die. Mac shows it as still being up, but nothing over the VPN works until I reconnect and disconnect. I am happy to have a my monitors sleep, but ...
0
votes
1answer
63 views

Macbook's “Internal Memory Card Reader” uses 896ma/900ma doing nothing, is this normal?

One a new mid-2014 macbook pro: Internal Memory Card Reader: Product ID: 0x8406 Vendor ID: 0x05ac (Apple Inc.) Version: 8.20 Serial Number: 000000000820 Speed: Up to 5 Gb/sec ...
1
vote
1answer
26 views

How can I determine what kept my macbook pro awake until the battery drained?

I left my laptop unplugged last night and woke up to 0% battery. This is not usually what happens. Is there a way I can find out, this time or next time, what caused that? I assume something was ...
3
votes
1answer
634 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 ...
2
votes
1answer
7k 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 ...
1
vote
1answer
19 views

really bad power consumption on mid-2013 MacBook Air

I'm getting a really bad power consumption on my mid-2013 MacBook Air 11" w/ OS X 10.9.4. I think the issue is that I have too many tabs open in Safari and SeaMonkey, and they're all taking a lot of ...
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0answers
111 views

2013 Macbook Pro won't power on or wakeup until SMC reset each time.

I recently got a kitten who likes to walk up and down my macbook. I've been pretty good at keeping her off so far, but yesterday she started to trample across the keys. I lifted her off and closed the ...
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1answer
14k views

SMC Reset Won't Work on Macbook Pro Retina mid-2012

I have followed all the correct steps for carrying out an SMC Reset, however my Mac continues to boot normally. The issues I currently am dealing with are: Slow performance Battery light on power ...
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3answers
2k views

Prevent iMac from sleeping, for VPN login?

We have an iMac in the office, and I have been getting inconsistent access when trying to log in to it. The firewall isn't going down, since I can connect to the VPN. After discussing it with the ...
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4answers
6k 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
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2answers
8k views

MacBook Pro won't power on after SMC reset

Some water was spilled on the table and came in contact with my wife's Mid 2009 MacBook Pro near the MagSafe adapter causing the MBP to shut itself off. Based on some recommendations from the ...
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0answers
88 views

Turn off Thunderbolt display in Windows 7 Boot Camp

The Thunderbolt display doesn't have an on/off button, and in OS X I can toggle off the display with control-shift-eject, but how do I toggle it off in Windows 7 Boot Camp?
3
votes
1answer
359 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 ...
4
votes
4answers
351 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
313 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
93 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
95 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 ...
4
votes
2answers
40 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 ...
2
votes
1answer
532 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
428 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
2k 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
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2answers
9k 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 ...
8
votes
5answers
8k 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 ...
2
votes
3answers
2k 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
121 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
1answer
409 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
82 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 ...
0
votes
0answers
133 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
197 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
1k 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 ...
1
vote
0answers
105 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
331 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 ...
6
votes
1answer
2k 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
42 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 ...
5
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
325 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 ...