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

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1
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2answers
3k 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 ...
6
votes
2answers
5k views

High fan speed and CPU temp with low CPU usage?

I've been having intermittent fan speed and high CPU temperature when my CPU usage is nearly 0%. I don't run any weird apps. If I put my computer into sleep mode and wake it back up, this fixes the ...
3
votes
1answer
12k 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
62 views

Darken Background Illumination When There is No Window

I have a MBP in a dualscreen setup with the laptops display as secondary. I'd like to know if there is an application that dims the display's illumination when there is no window drawn on the laptop.
0
votes
1answer
52 views

High fan, No battery symbol, Battery not charging on Macbook Pro Mid 2009

Recently, my MacBook Pro has had the following issues: If the battery dies, I need to do an SMC reset for it to even start up. When it does, the fan is running at high speed and there is either no ...
1
vote
0answers
15 views

Do not reopen windows/applications when battery down

When my battery of my laptop is empty, my computer falls out. It first tries to dump memory to the SSD in order to reload from there the next time. However, sometimes this fails and it has to do a ...
6
votes
3answers
16k 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
1answer
41 views

MacBook Pro (late 2013) w/ Yosemite & FileVault won't boot: LCD light only, no other activity

After lid-sleeping my machine with ~10% battery left, a few hours later, attached to AC power, it would not wake from lid-open, keypress, or short power-button-press. After doing a ...
8
votes
1answer
525 views

Is there a way to force “low power” graphics?

Is there a plist or hidden config to set my graphics/energy preference to "Always use low power/ integrated graphics"? Seems like energy saver preferences only allow choosing between: Smart auto ...
3
votes
3answers
865 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 ...
2
votes
3answers
154 views

Is there a way to tell how long your Mac was turned on on a distinctive day?

I would like to know how long my MacBook Pro was on today - total uptime for the day. I just bought it, and I thought the battery was bad but it went on for longer than I thought. Of course, I wasn't ...
1
vote
0answers
42 views

New Battery: Runs out at “10% left”

I installed a new Apple battery in my MacBook Pro (13-inch, Late 2011) myself (bought the battery new from iFixIt). Installation worked great, extra 4 hours of battery life - fantastic. Then I ...
0
votes
1answer
30 views

Battery cannot charge fully

I replaced battery on my MBA mid 2011 (A1369). Here is the report by coconut(the same appears in system report): I bought no name battery from china and changed it personally (here they ask about ...
0
votes
1answer
3k 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 ...
0
votes
0answers
106 views

My Macbook Pro dies randomly, doesn't start, and Apple couldn't solve it

let me start by saying this: I brought my Mac to the apple store for them to open up and find out what's wrong with my macbook pro (2013). They couldn't replicate the problem, therefore they couldn't ...
0
votes
2answers
9k views

Can't power on without SMC reset whilst holding power

Grabbed out my old unused White Macbook 13" Mid 2009 (Macbook 5,2) because I'd like to donate it to someone. However, it wouldn't power on or charge (no light on the MagSafe adapter). I worked out ...
10
votes
1answer
14k 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 ...
1
vote
1answer
62 views

Do I need NVRAM/SMC reset to restore a used MacBook Air to defaults?

I've bought a used MacBook Air (Mid 2013) running Yosemite and I'd like to restore every setting to defaults, as in, start over with a fresh clean OS. What are the things I have to run to make sure ...
0
votes
1answer
45 views

Keep Mac ON for background work with minimum power

Say I am doing a long download. How can I keep the Mac stays sufficiently awake but with minimum power usage? I would also like minimum power when: I am using it as a surveilance camera. I want it ...
0
votes
0answers
87 views

Can I configure OS X's built-in UPS support to work with an older APC SmartUPS?

I have an APC SmartUPS 1400 which works great as a UPS. It has a serial port which can be used to manage it using RS232, but the automatic UPS support in OS X doesn't recognize it as a UPS when I ...
8
votes
1answer
2k views

Sleep timeout missing from the energy saver preferences

I have two Macbook Pros running on Yosemite. The first one is a 17 incher from 4 years ago. I'm able to set the time that it sleeps. The second one is a 15 incher retina made this year. In its energy ...
0
votes
1answer
96 views

Macbook Pro with abnormal CPU usage and unrecognised battery. How to alternative SMC reset

This Macbook Pro (15" circa 2012) is giving me trouble. After a slight water spill incident, I removed and replaced the hard drive, optical drive and battery (warning sticker ignored). After another ...
0
votes
0answers
125 views

How to stop OS X from system sleep when the Display sleeps?

On OS X Yosemite I found that all operations interupt once I switch of the monitor for a while. Most notabaly copy processes of large files, simply pause. Every time OS X puts the Display to sleep (or ...
1
vote
0answers
621 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 ...
0
votes
1answer
119 views

Only hibernate when closing the lid, display sleep otherwise?

I am looking for a way to hibernate (i.e. RAM saved to HDD then turned off) only when closing the lid. When the lid is opened, I expect OSX to simply turn off the screen after X minutes (i.e. ...
7
votes
2answers
3k views

How to not let the system sleep when putting display to sleep with Ctrl+Shift+Eject in Mountain Lion?

In Lion I always used Control ⌃+Shift ⇧+Eject ⏏ to put my display to sleep when I walked away from my computer. The system would continue running and not go to sleep. Now in Mountain Lion when I put ...
1
vote
0answers
91 views

MacBook Pro doesn't detect power supply

My MacBook Pro (early 2009) doesn't detect when the power supply is connected and doesn't charge. It behaves as if the power supply was not connected to the MBP. It has 56% battery left and runs fine ...
3
votes
2answers
57 views

Don't charge iphone when plugged into macbook?

Is it possible to temporarily keep your iPhone from draining the macbook battery? When I'm out and about I sometimes want to connect my [nearly empty] macbook to my [not so empty] iphone so I can ...
0
votes
0answers
101 views

Only sleep MacBook Air when lid is closed

I have the following power management settings defined for my MacBook Air. Shantanus-MacBook-Air:~ shantanutomar$ pmset -g Active Profiles: Battery Power -1* AC Power -1 Currently in ...
1
vote
1answer
1k 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 ...
1
vote
1answer
98 views

How to change “Automatically reduce brightness before the display goes to sleep” in Yosemite?

A few OS X releases ago, there was a checkbox in the Energy Saver settings for "Automatically reduce brightness before the display goes to sleep". This doesn't appear to be there any more, and hasn't ...
0
votes
1answer
524 views

How to enable “Click-to-play” in Google Chrome Version 43.0.2357.124 (64-bit)?

I run Google Chrome Version 43.0.2357.124 (64-bit) on OSX Yosemite. I want to enable "Click to play" option, mainly because I would like to lower the power usage of Google Chrome and Google Chrome ...
3
votes
2answers
607 views

Can I use a Mac mini without the power brick?

I don't have the power brick for my Mac mini with me but I have cord that plugs into the back of it, can I use it without and plug directly into the wall? Any harm? The model is A1347
0
votes
0answers
105 views

How to manage the output power of WiFi network built with Internet Sharing?

I'm asking myself what is the level of radiofrequencies which are passing through me and my neighbourgs. I discovered that my Wi-Fi network is entering the appartments one floor above mine, one floor ...
0
votes
0answers
185 views

How do I get rid of this power assertion from a dead process?

I have the screensaver on my MacBook set to kick in after two minutes of inactivity and require a password immediately after it does. Normally, this works fine, but in the last week or so, the ...
0
votes
1answer
2k views

MacBook Pro battery percentage jumping down and up

Recently, my 2011 MacBook Pro 13' produces strange instantaneous jumps in battery percentage. Sometimes, when it is discharging, it drops by ~40% (and if it was near or at less then 40%, it shuts down ...
0
votes
0answers
56 views

rMBP different brightness settings on battery and plugged in

Is it somehow possible to manually control the dimming in OS X Yosemite (10.10.2) like Windows 7 power plans? I would like to have one brightness setting, when on battery (30% brightness) and another, ...
0
votes
2answers
1k 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 ...
0
votes
0answers
671 views

Resetting SMC on a Macbook Pro

About a couple of weeks ago, I tried turning on my Macbook Pro and it seemed completely dead. I plugged in the power cable but it still didn't work. Since it's not under warranty anymore, I opened up ...
0
votes
1answer
102 views

How to know if (and when) a shutdown occurred due to power outage

I have a Mac in a remote location that operates as a server. It's configured (from Energy Management) to automatically power up in case of blackout as the power comes back. How can I tell if a power ...
2
votes
1answer
157 views

Early 2011 MacBook Pro SMC firmware update question

OS has been upgraded to Mavericks. Can I still run the SMC firmware update 1.7 said to be for OS 10.75 and 10.82? Would it hurt anything to try this firmware update with the later OS?
3
votes
1answer
380 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 ...
1
vote
1answer
6k 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
votes
1answer
418 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
436 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 ...
2
votes
0answers
1k 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
1answer
168 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
219 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 ...
0
votes
1answer
375 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
34 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 ...