The electricity drained by a device

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3
votes
1answer
233 views

What is the data corruption risk of force shutting down a running Mac?

Eg when the power supply is cut or someone presses the power button for 5 seconds? How big of a risk am I taking to my data? Is it a 1% chance of corrupting data? I know most mac these days have a ...
3
votes
4answers
2k views

Is there a safe way to shut down a Mac that doesn't have a keyboard or mouse?

I'm trying to safely shutdown a Mac desktop that does not have a keyboard or mouse connected to it any more, after hardware damage to the only keyboard and mouse in the house. It also does not have ...
1
vote
2answers
1k views

My battery is not charged. The only way to operate is to plug the computer in

My battery says 0% charge, there is no x over my battery icon. The MacBook runs fine on corded power but dies as soon as I unplug. What could be the problem?
6
votes
3answers
14k views

Does closing the lid put a MacBook Pro to sleep? Would it hurt the computer if I carry it around without shutting it down?

When I first got my MacBook Pro, it took less than 30 seconds to start up. Now, after several months, it takes about two minutes to startup and I can tell that it is not as responsive when using some ...
1
vote
1answer
146 views

macbook - low power from the command line

I often (for example on the train) want to put my macbook into a state that will maximise the amount of time I have before the battery runs out - so far example I'll switch off the bluetooth, then ...
4
votes
1answer
299 views

Can you power on a MacBook with a wireless keyboard?

Is it possible to power on a MacBook using a wireless keyboard? If that sounds strange, I'm asking because I use a Bose radio as the sound system and the radio fits nicely on top of the laptop.
1
vote
2answers
812 views

Macbook Air (13" 2012) Fails to wake from sleep

The Air doesn't wake up from sleep mode when the lid is closed. Have to do a hard restart by pressing the power button for 5 secs which isn't nice. Tried to select the startup disk from system ...
3
votes
1answer
294 views

85W MagSafe adapter only delivers 77W?

My late 2011 17" MBP was delivered with an 85W MagSafe adapter. Under heavy stress (either CPU and/or GPU) the MBP has to draw additional power from the battery in order to keep everything running. ...
5
votes
2answers
10k views

How do you check how much current a Mac USB port can deliver?

This question is similar to the superuser question "How to check how much power a USB port can deliver", which is answered for Linux and Windows. How do you check the same on a Mac?
1
vote
1answer
168 views

Late 2008 MacBook Pro no longer wakes up on its own

Plain and simple here: about one week ago, my MacBook Pro stopped adhering to its wake schedule. I have had it set to wake every weekday at 6 a.m. for as long as I can remember. It has done so with ...
1
vote
2answers
790 views

Will a MacBook Pro (15-inch, Mid 2010) power up in clamshell mode?

Although part of my problem is covered here - Powering on while the lid is closed in clamshell mode, it alone doesn't solve my query. I'm trying to turn my MBP into a server, and because of that I ...
3
votes
7answers
5k views

Is my MagSafe covered under my MacBook's AppleCare?

I have a white 2010 MacBook, and the outer casing for the wire on the MagSafe power adapter has developed a small split. Is this something that may be covered under my MacBook's AppleCare? Is it ...
3
votes
2answers
1k views

Battery issue with MacBook Pro 13 inch (Early 2011)

So, around June 2011 I finally had the chance to buy my first Macbook Pro (13 inches, i5) But recently, I've noticed something wrong with my battery! Actually with only 2 months of use, I was under ...
3
votes
3answers
5k views

Can I safely charge an iPhone 4S with a 5V 2A source?

I just bought a New Trent IMP99D external battery, to keep my phone alive while gaming during long-haul flights. It has two USB ports to connect to, one which supplies 1 amp at 5 volts, another which ...
4
votes
2answers
151 views

Unexplainable large number of cycles of MacBook Battery

My battery is a year old, but it has 189 cycles. Why is this? I always use my MacBook with the charger plugged in and very rarely without the charger.
8
votes
6answers
29k views

“USB device drawing too much power” error on startup with no devices connected

Since upgrading to Lion, I get this error every time I start up: I've read the answers suggested here, but they seem to indicate that it's the presence of a second device that's causing the ...
2
votes
3answers
3k views

I have a 2008 Macbook Pro will a 85w power cord work?

I have a 2008 Macbook Pro and my cat recently chew through that power cord. I bought a 85w adpater but I don't want to open it if I know it won't work. Does an 85w work with a 2008 Macbook pro or ...
2
votes
1answer
376 views

iOS app for toggling bluetooth when iPhone is plugged into dock

Are there any apps that will toggle bluetooth on/off when the phone is plugged or unplugged from power? I only use bluetooth in my car when it is plugged in the dock so that is the only time I would ...
3
votes
4answers
1k views

MacBook won't sleep while charging

An ongoing problem: my MacBook Pro (i5, 2.4ghz, 15") won't sleep while charging. I close the lid, but I don't get the pulsing "sleep light", it just stays fully illuminated. If I listen closely, I ...
5
votes
2answers
5k views

Monitoring power consumption on Mac

The Android OS monitors the power consumption of running apps and hardware (display). As you may guess, this is a useful feature as it allows to track down energy greedy apps. Is there an application ...
4
votes
1answer
610 views

Should I spin down Mac Mini's drive?

I have a Mac Mini (2010) that I use as a home server with a DAS (2 drives) attached over USB. Everything is on 24/7. From all my research online, it seems that spinning hard drives up and down ...
2
votes
1answer
803 views

Are there no explicit Power modes in Mac?

Does Macbook Pro not provide power modes (Power Saver, High Performance, etc) like a Windows laptop? If there is nothing like that, then I'd assume that OS X manages optimal settings itself. Or is ...
2
votes
3answers
977 views

MacBook Pro shuts down when unplugged

I have a late 2008 MacBook Pro work computer. Here's the sequence of events: I fully charge the battery I unplug the Mac from the power cable The Mac immediately shuts down Before unplugging the ...
0
votes
3answers
2k views

App to shut down iPhone 3G

Is there an app to shut down my iPhone 3G? It's a non jailbroken iPhone and the power button isn't working anymore. So I need to shut it down with an app. Any advice?
5
votes
1answer
1k views

Is there a way to get the OSX battery icon to display both percentage and time?

I am working on a 2006 MacBook with Snow Leopard. The battery level indicator has the option to show Time or Percentage remaining. I would like to show both. Is there a way to enable this? or Can ...
0
votes
1answer
1k views

USB thumbdrive plugged into Macbook Pro which instantly goes black, bricked?

New 2011 Macbook Pro 8,3 less then three months old, this is my first ever Apple product. I have an old USB thumbdrive I couldn't remember what was on it so I plugged it into the USB port nearest the ...
7
votes
7answers
10k views

How can I avoid my MacBook Pro giving me minor shocks?

The aluminum Macbook Pro gives a mild shock when connected to a wall socket and charging. It only happens when I'm, for example, not wearing shoes or slippers and my feet are resting on the ground ...
0
votes
0answers
356 views

How to put MacBook Pro to sleep when the lid is closed and you remove the power?

I think I have a common use case that is not properly handle by Lion. If I close the lid and remove the power supply, my macbook is not going to sleep mode and stays awake draining the battery. It's ...
5
votes
3answers
7k views

Which uses more battery when tethering - Wifi or BT on iPhone 4S?

I'm not really bothered which is quicker - I'm guessing this is wifi anyway. I just want to know which would allow me to get the most life out of my iPhone 4S when tethering to it with may MBP. ...
1
vote
2answers
387 views

Transporting from home to work (~10 min by car), should I just make my MacBook Pro sleep, or shut it completely down first?

I just got a new MacBook Pro, and is looking at how the power modes work, and according to this article: About Energy Saver sleep and idle modes in Mac OS X, making it sleep by closing the lid (say) ...
0
votes
1answer
99 views

Power Macbook Air with Early 2008 Macbook Pro

I have two batteries from my old 15" Macbook Pro Core 2 Duo (Early 2008). It's a non-unibody (discrete) model. Anyone know of any way to use these batteries to power my 2nd Gen Macbook Air? An ...
1
vote
1answer
474 views

Can I use my UK Mac Mini (Mid 2010) in the US?

I'm from England and I'll be going to the US and I'd like to take my Mac Mini (Mid 2010) (not the newest version). My main question is: would it be safe to use over there? I'm worried because of the ...
5
votes
3answers
1k views

Is it bad when my iMac is constantly on?

Is it bad if I never shutdown my computer? I am asking solely terms of hardware so let's assume my software is stable and I reboot regularly to clean up software errors. If running constantly is ...
1
vote
1answer
1k views

Replacement plug on MagSafe adapter?

The plug portion of my power adapter broke off. Fortunately, this piece of the adapter seems to just slide off of the main adapter body, attaching via a round metal piece. So basically I would just ...
0
votes
1answer
104 views

Can a PowerBook or MacBook be configured to automatically wake when power is connected?

I'm looking to turn an old Mac laptop into a "car-puter". However, I don't want to drain the battery on either the laptop or the car. Is there a way to configure it so that the computer automatically ...
1
vote
1answer
4k views

Where can I buy a spare power cable for a i5 Mac Mini?

I don't see extra power cables for the i5 2011 Mac Mini in the Apple Store Accessory section. But this power cable looks a lot like black ones I've seen that go between a power brick for a Lenovo ...
4
votes
3answers
2k views

“usb device was drawing too much power” error message

Ever since I upgraded to Lion, I've been getting this error message a lot. It seems to trigger(not every time though) when I plug in my iPhone to the usb port on my keyboard. The only other USB ...
2
votes
3answers
8k views

MacBook Pro 2011 logging itself out after a period of inactivity

when I am not using it, at some point, every day, my MBP tries to log out on its own. When I 'wake it up' I can see message windows about "applications aborting logout", obviously because some ...
2
votes
2answers
317 views

I am only seeing 1:50 of estimated run time on a new MacBook Pro battery. Problems?

I have bought brand new MacBook pro 15-inch model with highest specifications in this June. I have also installed newest Mac OS, Lion. However, how it could be strange, when cable is not plugged it, ...
2
votes
2answers
2k views

Apple charger port magnet has lost it's pull

My friends laptop was dropped and fell directly on the power charging connector as it was connected to the charger. Now the port still works, but the strength of the magnet that holds the connector ...
3
votes
3answers
4k views

Lion - Macbook randomly wakes up from sleep when lid is closed

I have aluminium macbook (not pro). I have recently updated to Lion. So far so good - had some minor issues with printer, sshfs, mac fuse. Managed to resolve almost all of them. There is one issue ...
1
vote
2answers
447 views

Intermittent charge on Macbook Pro

I have a 2010 Macbook Pro with a MagSafe T Power adapter. The power adapter makes a buzzing/hissing/fuzzy noise when it is plugged into the wall. When it is plugged into my mac, my light turns green ...
1
vote
1answer
204 views

How to check if internal HDD spindle is off after unmount

I use SSD instead of optical drive in my Macbook MC516LL, so I have bunch of reasons why I wants to keep HDD's spindle off: Preserve HDD from shock Reduce energy consuming Reduce overall system ...
2
votes
1answer
655 views

For a Macbook Pro, what are some recommend power plan settings for Windows 7 via Bootcamp

I would like to ask if anyone has some recommendations on some of the specific settings for Window power plans (especially advanced parameters) for a Macbook Pro. For me specifically I have an early ...
10
votes
8answers
7k views

How to retrieve current wattage info on OS X?

Is there a way to retrieve the current watt usage info on OS X Snow Leopard? I'm using mid-2010 iMac, so I'm not looking for just battery-related apps. Does OS X even monitor power usage? Do I need ...
0
votes
2answers
257 views

2008/9 Mac Pro wont turn on, front pannel LED is constant white

My mac pro doesn't want to start up. I purchased some new memory installed it (and cleaned up some of the dust on the inside of the box) and now the machine won't boot up. I get a constant white ...
1
vote
1answer
14k views

How to change power savings settings on iPad 2, iOS 4.3.3

After a few minutes, if I haven't touched the iPad 2's screen, it goes dim and then turns off. I suppose this is a power savings behavior; however, when it is connected to my computer I don't want it ...
0
votes
0answers
505 views

PowerBook G4 PMU Reset Required

I have to do a PMU reset to turn on my G4 PowerBook (1.25 GHz). This occurs on every shutdown of the system. What are potential causes of this? I'm perfectly happy to troubleshoot, but on Google ...
5
votes
1answer
11k views

MacBook Pro Charger has stopped working properly - any short-term fixes?

I have a MacBook Pro 15", about a year old. Today, the charger started working only intermittently. I've seen a few other people talking about similar problems, and most people say it's a problem with ...
9
votes
2answers
7k views

How to monitor USB power consumption?

I'm looking for a way to monitor the power being drawn from the USB ports on my Mac. System Profiler doesn't appear to display this and I haven't been able to find any applications or tools to do the ...