The electricity drained by a device

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1
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1answer
98 views

MacBook Pro Boots only with a pressed key

I'm having a bizarre issue with my early 2011 Macbook 15'. I grabbed it today without battery power só the first thing I diz was to plug the MagSafe adapter. Afterwards I pressed the power button. It ...
1
vote
0answers
21 views

How to drawn power from a lightning connector?

I'm working on an iPhone accessory that needs to grab power from a lightning connector. Something like the lightning-to-USB cable, but I'd like to do that on a DIY way :) The problem is that, ...
0
votes
0answers
23 views

How can I SMC Reset with this issue?

Okay so my friend gave me his old mid-2010 MacBook Pro. It has an aftermarket battery in it, the first one died and after his friend put the aftermarket one in it never started. I did the cycle where ...
1
vote
1answer
60 views

mid-2012 Macbook Pro Retina 15" won't recognize new adapter

I recently bought a new power adapter off Amazon, and it worked with my mid-2014 MBP at work and my colleague's mid-2014 MBP, but not my mid-2012 MBP Retina 15" (which, frustratingly, it was bought as ...
0
votes
0answers
10 views

Is there a way to get live power usage

I'd like to monitor how much power is being used by my Mac. The tools I've found so far either list the maximum power (85W for my laptop charger) or the processor's usage (Intel's Power Gadget). I'd ...
0
votes
1answer
40 views

Macbook Air recognizes battery while starting, but later says “no battery available” (battery icon X)

I spilled a full glass of water on the keyboard of my Macbook Air 11" mid-2011 (running OS X Mavericks). After drying everything out, etc., here's what happens when I start the laptop: It has to be ...
1
vote
1answer
508 views

Mac does not automatically restart when power is re-applied after `shutdown -hu now`

I want to have a Mac Mini automatically boot when power is applied, as I cannot conveniently reach its power button, because it resides inside an art installation, where the power will be shut down ...
0
votes
0answers
24 views

Macbook pro never goes to sleep

I got a brand new mid-2015 macbook pro 15", OSX 10.11.3. Display never turns off even it is configured to turn off after 10 mins in power adapter AND in battery mode. Screen saver (aerial) stays ...
0
votes
2answers
48 views

Battery not charging? (Even after SMC reset)

So, I've seen a couple topics like this that already exist, but none solved my problem. I plug in my charge to my 13-Inch MacBook Air, Early 2015, and the LED light did not turn on, and the battery ...
1
vote
1answer
92 views

Is it safe to swap the “duckhead” connector from an old power supply to a new MagSafe 2?

Working from home today and I just pulled my macbook pro out to realize that I left the "duckhead" part of my magsafe 2 power supply (85W) sitting on my desk when I left the office last night. I ...
0
votes
0answers
62 views

2011 Macbook Pro won't boot unless I SMC reset and do a combination of attaching battery and charger

From what I read, on this model of MacBook, an SMC reset is done by removing the battery and holding the power button down for 5 seconds with no charger or battery attached. I tried the other method ...
1
vote
2answers
30 views

Make Mac boot upon plugging in power

I have a MacBook and I'd like it to boot automatically upon plugging it into a power source. Is there a way to do this?
-1
votes
1answer
2k 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.
3
votes
1answer
615 views

How to disable the “this cable or accessory is not certified” message on iPhone?

The message "this cable or accessory is not certified and may not work reliably with this iPhone" pops up whenever I use a 3rd party USB cable for it. It's really annoying, because then I'd have to ...
0
votes
0answers
142 views

iMac will not boot up with built-in LCD connected, but will boot without it

When I press the power button on my iMac (Early 2008 24" A1225 EMC2211 MB325LL/A) it begins to start up, but halfway through the start chime it loses all power and needs to be unplugged before the ...
0
votes
1answer
67 views

Can a 3.7 Watt LiPo battery trigger the charging symbol on an iPhone?

I am trying to use a 3.7 Volt 1 Amp (so it's 3.7 Watts) Lithium Polymer battery to charge or at least trigger the charging symbol on an iPhone 5. I have charged the battery fully using the Lithium ...
0
votes
2answers
5k views

Power reserve mode - lightning bolt

I cant get the watch out of power mode. It has a lightning bolt on the screen. What does this mean?
0
votes
0answers
72 views

Power button, keyboard not functional after thermal place replacement (MacBook Pro 13, Late 2011)

After some searching on the internet, I have been struggling to reconnect the keyboard to the MacBook Pro after taking out the logic board to replace the aging thermal paste. I was following the ...
0
votes
1answer
30 views

Splice a 45W MagSafe 2 connector onto an 85W PSU?

I have an unused 45W MacBook Air MagSafe 2 PSU, and an 85W MagSafe 1 PSU that my dog chewed the connector off. I'm wondering if splicing the MagSafe 2 connector onto the 85W PSU would allow a MacBook ...
0
votes
0answers
118 views

Pinout and specs on 150W Cinema Display A1098 power supply?

I've inherited a 30" Apple Cinema Display. It's in great condition except for one thing: no power supply. I could pay $150+ for a used power supply on eBay, but -- with my past life as a ...
44
votes
10answers
81k views

Can I use 45/60/85W MacBook chargers interchangeably?

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
0answers
26 views

13" mid 2007 Macbook, battery / power supply issue (white, A1181 model)

So, I have mistreated my macbook somewhat and would like to repair the damage. The problem is, there is "no battery supply", the icon at the top bar is a battery with a cross through it. There are ...
0
votes
0answers
72 views

Macbook Pro logic board getting no voltage

Laptop: MacBook Pro 13" Retina Display Late 2013 Logic Board: 820-3476 I have been doing testing on my logic board with the board removed from the computer and just plugging in the charger. I had an ...
6
votes
4answers
86k views

How do you get the Apple Watch out of Power Reserve mode?

I got it into power reserve but can't figure how to resume normal mode. I have tried tapping and pressing the screen and holding both side buttons.
0
votes
1answer
119 views

How to eliminate noise on iPad analog/headphone output?

I'm a musician with a home studio. I've been wanting to incorporate my iOS devices (iPad 3, iPad mini retina, and iPhone 4s) into my music making for years, but only recently have synchronization and ...
1
vote
1answer
33 views

If I buy a power adapter from the online Australian Apple Store, will it match Australian outlets?

I want a power adapter for a MacBook Air that matches Australian outlets (without a separate adapter). It seems reasonable that if I buy such a thing from http://www.apple.com/au, it will have the ...
3
votes
2answers
92 views

Explanation for wrong charging wattage / slow charging?

I have a 2013 Retina MBP and a fairly new 85 W Magsafe 2 charger. But when I connect this charger to my Macbook and check in Battery Health, it claims that it is receiving only 49 W. Does anyone ...
0
votes
1answer
394 views

Macbook Pro (Mid 2012) Battery Not Charging

I have a Macbook Pro (Mid 2012) 13" unibody and having issues with a battery that is not charging. Here are the specifics: Battery is not charging Magsafe light not illuminating at all Macbook is ...
5
votes
1answer
567 views

Use caffeinate to prevent sleep on lid close on battery

The native caffeinate utility is not working to prevent my macbook from sleeping when I close the display. Instead, the system sleeps and various network services ( VPN, screenshares, VOIP calls, ...
0
votes
2answers
130 views

MacBook Pro battery will not charge even though cycle count is below max count

I haven't used my MacBook Pro (Mid 2011 version with non-removable battery) for over 6 months, as I was out of country. Now it only works on power connected and battery won't change. Symptoms I ...
1
vote
1answer
1k views

iMac sounds like it's starting up then shutting down immediately

I have an iMac. Since yesterday, it has been making sounds where it seems like a hard drive is starting up then shutting down immediately. However, that can't be possible of course because the ...
0
votes
0answers
33 views

Can a 15" Retina MBP running 10.11 (El Capitan) determine if the attached power source is using a MagSafe adapter?

I have a first generation 15" Retina MBP. Recently there have been times when it runs out of power even though I'm plugged in. I have tracked it down to charging being intermittent if anything but a ...
3
votes
2answers
54 views

Is it safe to discharge my body's static electricity onto my MacBook Pro?

Often in the winter (low humidity), getting up from and sitting down onto the seat at my desk, or taking off a jacket, and such will build up a static electric charge on my body. Sometimes I don't ...
4
votes
5answers
10k views

No Batteries Available ?-How to Check battery health on MacBook Pro early 2011

A few days ago, I went on vacation and unplugged power cable from my MacBook Pro 13' early 2011 and then I got back home, the battery was not detected by OS and didn't charge. I then understood that I ...
0
votes
0answers
38 views

iPad 2, IOS 8.x, power issues, freezes when screen turns off

My iPad 2 64GB non 3G has stopped working and need help diagnosing what component is broken. When I would click the power button to turn the screen off or let it auto-lock after 2 or so minutes, I ...
0
votes
0answers
37 views

plug in charger when using OR charge it when low battery

I am working in an office for 8 hours a day. And I am using a macbook pro retina 2015 during that 8 hours for work. What habit should I be use to treat the battery better. There are two choices for ...
0
votes
2answers
33 views

Current power consumption [duplicate]

Is there a way to know the current (or average power consumption) on OS X (a Mac Mini without battery). Preferred would be a command line tool but anything is OK.
1
vote
1answer
25 views

MacBook power cable with mounting holes

my question is, if there is MacBook power cable with mounting holes. I think better picture than thousand words, I mean this power cable end: with mounting holes, somehow like this:
0
votes
0answers
48 views

Macbook 13" mid 2009 not charging nor starting

I disconnected the battery (A1331) on my Macbook 13" white polycarbonate unibody to install a second SSD in place of the unused DVD. I was also upgrading the RAM, that's why I decided to ignore the ...
1
vote
1answer
2k views

USB Devices Disabled when no devices are connected

using iMac 5K OS 10.10.3 When there are no USB devices connected to iMac, it keeps showing this. I tried SMC resetting, booting through Safe Mode, and nothing is working to make this alert go away. ...
0
votes
1answer
118 views

How to prevent MacBook Pro from sleeping with turned off external display?

I have two displays connected to my MacBook Pro Retina 2015, running 10.10. It is connected to power, so it will not sleep once I close the lid. However, if I am doing long during calculations over ...
2
votes
1answer
107 views

Why doesn't a stripped/cracked MagSafe power cable shock?

Behold, the fate of all (poorly handled) MagSafe power cables: Why doesn't this shock me? I've read that MagSafe cables are low voltage, but I don't even get a tingle. Is there any danger of shock,...
0
votes
2answers
488 views

MacBook Pro - Only runs while MagSafe charger connected

My 2013 MacBook Pro only runs while the MagSafe power charger is connected. Model Number: A1425 (EMC 2672) When the charger is disconnected system immediately powers off (no shutdown). MagSafe ...
0
votes
0answers
19 views

power status of MBP 13" (Early 2015)

I have the hibernate mode set to 25 but I think the laptop is not hibernating when I close the lid. In earlier versions of MBP there used to be a LED light available on the right-hand side of the ...
2
votes
1answer
205 views

My (unbroken) iPhone won't turn on!

I have an iPhone 5. The only issue it's had is that the battery life wasn't so great as it once was... until now. Earlier the battery went flat and it switched to this screen Totally normal. So I ...
0
votes
1answer
53 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 ...
2
votes
4answers
11k views

Is it possible to charge my MacBook Air from a powerbank?

I recently bought a powerbank that has two USB outlets. It's great for charging my phone and iPad. Is it possible to charge my MacBook Air from the powerbank? If it's not possible to do this "out of ...
0
votes
0answers
31 views

What wattage of passthrough charging does the Lighting port enable for MFi devices?

I understand that with the "Made For iPhone" (MFi) program, you can do passthrough charging/powering. What wattage does this support?
1
vote
1answer
265 views

Can I unplug my Mac mini from power once it's in hibernate mode?

Suppose I want to work on my Mac mini here, reach a certain point in my work, then put it in hibernate mode and unplug the power. From what I understand the hibernate mode will save the status of the ...
1
vote
1answer
161 views

How to turn MacBook Air 2015 on if the power button is broken and I don't have tools to remove battery?

The power button on my macbook air 2015 is not functional and I don't have the correct screwdriver to open the back up and take out the battery. Is it possible to turn the laptop on without having to ...