The electricity drained by a device

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

How to fix a Macbook Pro (late 2013 model) with liquid damage?

I bought a refurbished 13" Macbook Pro (late 2013 model retina) from the Apple store website in Sept 2014. It worked great till last month, when I had some water leak out in backpack and get through ...
1
vote
0answers
16 views

Mac Pro 2008 Refuses to Boot

My Mac Pro 3, 1 began rebooting randomly one day and the next it wouldn't come back on. Pushing the power button results in a fan clicking in to life for half a second and then all power is lost. The ...
0
votes
2answers
70 views

Battery is not charging despite SMC reset

I have a problem with charging of my Battery which has been appeared last night. It was working perfectly well for a long time. All of my friends who had different laptops were so jealous at my ...
0
votes
1answer
27 views

Why did my Mac reboot into the “Set up your new Mac” screen after a power failure?

I accidentally turned off the power strip that my iMac was plugged into while it was still running. When I turned it back on again, it put me at the "Set up your new Mac" screen, asking me to accept ...
1
vote
0answers
23 views

MBP Powering Down When Idle

My mid-2012 MacBookPro (Model 9,2) has developed an issue with power in the past few weeks. When it is left awake for several hours, but is idle, it powers off. When I turn it back on and log in, it ...
1
vote
1answer
45 views

Turn on MacBook Air without keyboard

How can I turn on my MacBook Air model A1370 mid 2011 without a keyboard? I need to find the power on pads for the Mac:
11
votes
9answers
13k 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 ...
2
votes
1answer
123 views

Turn down TX power on AirPort?

Our floor has a blind spot so we needed to place an AirPort to cover two rooms. The AirPort in this particular room is transmitting at a higher power than needed, and its bleeding onto some areas ...
0
votes
0answers
10 views

iMac 27" to LG BT30N blu-ray drive cable?

What cable or cables do I need to connect my iMac i7 Retina to a BT30N external drive which has a 13 pin slim SATA female port?
4
votes
1answer
189 views

Can an iPad be charged while acting as a USB host?

I have an iPad that I would like to leave semi-permanently connected to a USB hub (connected to a couple of MIDI controllers and some USB speakers). As it stands, I have to remember to unplug it ...
1
vote
0answers
54 views

Only my cable can recharge my iPhone

My iPhone cable is the only one that can recharge my iPhone 5. I have tested around 5 other iPhone 5/6 cables and none of them work. I am apprehensive of either losing my cable or breaking it. The ...
0
votes
0answers
58 views

Logitech Type+ flashing blue; iPad Air 2 won't wake

When I leave my iPad Air 2 for some 5 minutes and return, my asleep iPad refuses to wake when I press the power button. I press the power button on my keyboard case (Logitech Type+) and the little ...
0
votes
4answers
710 views

Macbook Air power saving with Thunderbolt to Gigabit adapter

I am considering buying a Thunderbolt to Gigabit adapter to save my MBA power consumption as I can shutdown the Wifi, assume it use a lot of power. Anyone tried before and it works? How many % of ...
1
vote
3answers
2k views

My MagSafe to MagSafe 2 converter becomes extremely hot. Why?

Out of nothing, my MagSafe to MagSafe2 converter became extremely hot while charging. So hot, I could not even touch it. What could cause it? I've been using it so I can leave multiple old 85W ...
11
votes
1answer
229 views

Macbook started to consume battery more quickly

This seemed to happen after I did several things at once (all of which I have since reversed in trying to track this down): installed a (Crucial M4) SSD drive (replacing my old SATA 5400 RPM drive), ...
3
votes
2answers
525 views

Uninterruptible Power Supply not shutting down Mac Mini running Yosemite

We just received a brand new Mac Mini, which came with Yosemite pre-installed. Our UPS is set to shut down the computer after running on battery backup for 1 minute. I have tested this with an iMac ...
0
votes
1answer
70 views

MacBook Pro 13 doesn't fall asleep when the lid closed

I have a late 2012 MacBook Pro 13'. I've faced a strange problem: my Macbook does NOT switch into sleep mode when the lid closed. Same when open the lid - it does not wake. Instead of closing/opening ...
2
votes
1answer
44 views

Once I disconnect from the mains, can I leave the charger cable in the Mac?

I use my MacBook Pro on battery as much as possible, recharging when needed and once a month running it down to recalibrate etc. However, when the battery is charged to 100% I unplug the charger from ...
1
vote
1answer
87 views

Are Apple's AC Cords for MagSafe (1+2) always the same?

I am getting a customised MacBook Pro Retina and it will have a AC Cord for Britain, but I need one for EU/Germany. So can I easily switch the AC Cord of my MagSafe 2 to a German one? Are these Cords ...
1
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 ...
34
votes
10answers
54k views

Can a 60W MagSafe power adapter work interchangeably on a Macbook Pro that “requires” an 85W adapter?

I have a 13" Macbook Pro that came with a 60W power adapter and a 15" Macbook Pro that came with a 85W power adapter. Can I use either adapter with either laptop? There seems to be disagreement in the ...
0
votes
2answers
88 views

Is it better for the battery to leave the iPad plugged when charging is done?

I charge my iPad. Later, I notice that the battery is charged at 100 %. Now, what is better to preserve the battery capacity ? Unplugging the cable. Leaving the cable plugged. The answer may ...
22
votes
4answers
34k views

Is it OK to charge my iPhone with my iPad charger?

I have an iPhone 4 and an iPad. Since the iPad really charges best off the wall charger I keep it plugged in, but I usually just charge the iPhone off the computer. Although frequently if the iPad ...
0
votes
1answer
367 views

Charger problem for Phone purchased in US

I purchased Iphone 6 in US, and would be coming back to India. Which charger I should use here in India, as I know that there is a voltage difference in US and in India.
1
vote
1answer
19k 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
1answer
593 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 ...
0
votes
3answers
2k views

Where are the power-on jumpers on a mid-2013 MacBook Air logic board?

I'm trying to locate the power-on jumpers on the logic board of mid-2013, 13" MacBook Air. Similar to this question, but for the newer model MacBook Air. I have disassembled and cleaned all ...
16
votes
2answers
15k views

How can I keep my Mac awake AND locked?

I want to leave my Mac awake overnight so it syncs 4GB of data from Dropbox. I need to prevent the machine from going to sleep because that pauses the Dropbox sync I've been using Caffeine to keep ...
1
vote
1answer
41 views

Mac Air -first no sound, now it won't charge

First the sound went out on my macbook air. I was in the airport and tried everything I knew, nothing worked. Then I went to plug into an outlet I found, and realized it wasn't charging. It does ...
1
vote
2answers
37 views

Will it hurt my Macbook Air to be plugged into a “Uni Pak II” which is a dimming power source?

I'm at a conference and the only plug is a "Uni Pak II" which is a dimming power source (here's the manual). At first my charging indicator on the end of the MBA plug didn't light, but I slid up the ...
0
votes
0answers
53 views

How to identify dead battery in Macbook pro 15" Mid 2010?

I have a Macbook Pro 15" Mid 2010 and I believe it has a dead battery. When I plug in the magsafe adapter it glows green, but the Macbook will not boot when I press the power button. When I press the ...
5
votes
2answers
116 views

Earthed (Grounded) Stubby Plug for MacBook AC Adapter

Much hay has been made of the apparent grounding issue while using the stubby plug on a MacBook AC adapter. While I understand it is completely safe to have a bit of grounding flowing through the ...
0
votes
2answers
151 views

Can I use an iPhone 4S USB power adapter with an iPhone 5S?

I have an iPhone 4S, and I am thinking about upgrading to an iPhone 5S. I know that the iPhone 5S has the new Lightning connector, so I will have to get new cables. But what about the USB power ...
0
votes
1answer
35 views

MacBook Pro (5,5) restarts when powering microcontrollers

My Macbook Pro (13-inch, mid 2009, Intel Core 2 Duo) has an odd problem with the USB ports. Occasionally, when plugging in, removing or restarting a microcontroller such as the Arudino or Teensy, the ...
0
votes
0answers
14 views

iPhone Accessories Power Usage…What is possible?

Im toying with the idea of creating an iPhone accessory that would require that it draw power from the phone itself. So would the latest Lightning connector allow any accessories to draw 4.5V? Also I ...
12
votes
3answers
1k views

How does Apple calculate the energy consumption of a process in OS X Mavericks

In OS X Mavericks you can monitor the energy consumption of different processes in Activity Monitor. Here we can see 'Energy Impact' and Avg Energy Impact' and that the values can exceed 100. Also ...
3
votes
1answer
638 views

Why do I have to reboot my iMac and Wacom Cintiq after sleep?

I have an iMac and a 24 inch Wacom Cintiq. When I put the iMac to sleep, it freezes and I have to restart both the iMac and the Wacom Cintiq. How can I get around this?
0
votes
0answers
16 views

power and 13inch macbook pro

may I ask something about battery and power ? I have A 13 inch macbook pro , early 2011 . MC700 . what's the normal range of Voltage (mV) that should appear in the System report -> HARDWARE -> ...
0
votes
2answers
112 views

How to open Cinema Display power supply?

My Cinema Display bit the dust, and all the symptoms seem to point to the 150W power supply brick, which is apparently not an uncommon problem with those models. New power supply bricks are close to ...
0
votes
2answers
390 views

How to pack MagSafe cable to prevent its breaking?

I am looking for a (most) powercord-safe way to pack my MagSafe adapter for a daily backpack commute. Official Apple recommendations (as illustrated by third-party videos like this) don't prevent the ...
0
votes
1answer
26 views

Is the MacBook Pro Retina (Old Version) meant to come with an extension cable?

Is this Apple MacBook Pro ME665LL/A 15.4-Inch Laptop with Retina Display (OLD VERSION) meant to come with an extension cable to plug into this charger (link below). This is the cable I think is ...
2
votes
0answers
33 views

The power button turns MacBook off, but not back on

I have: replaced/soldered a new keyboard connector on the logic board as it had a missing pin, replaced the keyboard twice (the second and third keyboards work correctly), tried jump starting the ...
0
votes
2answers
3k views

Stop MacBook Pro from disconnecting network while downloading larger files

I am using a Gigabit Ethernet adapter (Apple) to connect to my network. While downloading larger files the MacBook Pro blanks the screen and disconnects the network even though it is active doing the ...
3
votes
2answers
733 views

Can I charge my Samsung Omnia W with MacBook Pro USB port?

Currently, I am using a Samsung Omnia W and mostly I am using my MacBook Pro's USB port for charging it. Is it fine for charging the battery in the mobile phone? Sometimes, I have received a 'high ...
1
vote
1answer
57 views

SSD in a 2012 17" causing GPU failures?

Just got my MPB back from Apple after taking it in with GPU overheating glitches. Apparently this model (2012) are prone to it and it's been exhibiting all the symptoms. Blue screens, grey screens, ...
1
vote
1answer
4k views

How much power does Apple TV use on standby?

I just bought a third-gen Apple TV, and I don't want to have to open Settings to put it to sleep every time I'm done using it. It seems it won't fall asleep automatically for quite some time, so I'd ...
0
votes
2answers
73 views

Does a driver exist to step up a PC USB 3.0 port to charge an iPad at 12W?

The iPad Retina requires 12W to charge. It appears the Mac has special non-usb-standard drivers that step up the USB 3.0 port to provide the extra power for charging. My question is: Does a driver ...
5
votes
2answers
29k views

Is it safe to use my US iPhone/iPad charger with a simple European plug adapter?

I'm using the US wall adapter that came with my iPhone to charge it: When I travel to Europe, is it safe to use this with a simple US-European adapter, or do I need a transformer or some other ...
2
votes
2answers
1k views

Macbook power adapter issue: PPP003

I'm using Macbook Pro 15" Retina Late 2013. OS is Yosemite Public beta. Once in month I usually do diagnostics (Apple's boot time diagnostics, the when you press "D" ). The last the when I did it, I ...