The electricity drained by a device

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2
votes
7answers
17k views

Best replacement for MacBook Air MagSafe 2 cable (OEM or 3rd party?)

My MagSafe 2 cable for my 2012 MacBook Air stopped working. Took it into Apple store where I had bought my MacBook Air, and sure enough it was the excessive cat chew marks that had degraded it*. Can ...
1
vote
1answer
38 views

How to use external monitor with MacBook Air closed and on battery power?

I often use my MacBook Air (running OS X 10.9.5) closed at a docking station, where it's hooked to external monitor, keyboard/trackpad, and power. All good. The only issue is that occasionally the ...
12
votes
11answers
15k 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 ...
1
vote
2answers
14 views

Thunderbolt dock statation power charging

There are two types of dock stations on the market: Docks use external MagSafe adapter to charge MBP. (MagSafe should be bought additional from Apple). Docks with only Thunderbolt connection to ...
2
votes
2answers
229 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
1
vote
0answers
40 views

How to disable “always on” USB power on Macbook Pro

I am operating my MacBook Pro early 2015 within a Henge dock (HD03VA13MBPR) , connected to two external displays and external speakers. Both displays and speakers get power from a power distributer ...
18
votes
3answers
19k 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 ...
0
votes
1answer
43 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? This is the cable I think is missing from my ...
0
votes
1answer
18 views

Need Help With iPhone 4

I have an iPhone 4 that I shut off with the touch assist because my lock button is broken. How do I get my phone to turn back on?
1
vote
1answer
1k 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 andpressing the screen and holding both side buttons.
0
votes
0answers
34 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. ...
1
vote
1answer
33 views

Show USB power use

I wanted to see how much power the Anker Astro external battery draws when charging from the MacBook Pro (Retina, 15-inch, Late 2013) (right hand port next to the SD slot), but when listing the USB ...
15
votes
6answers
30k views

What would happen if I use a Macbook Air Powersupply with a 15" MacBook Pro Retina (or vice versa)

My girlfriend has a Macbook Air. The power supply is smaller and lighter than the Pro. It has an output of 14.85V and 3.05Amps. My Pro Retina has a power supply that is 20V and 4.25 Amps. Both ...
0
votes
1answer
29 views

Macbook Pro not charging

My 2009 Macbook pro is not charging. I recently bought a new power adapter and when I plug it in the computer starts up fine although the date is set back to Jan 1 2001. When I click on the battery ...
1
vote
2answers
14 views

Can I get power from my Belkin Express Dock HD (Thunderbolt 2) for my MacBook Pro Retina?

I plug my MacBook Pro to my Belkin Express Dock HD via Thunderbolt, but I see that my battery is getting down. I was hopping to get power from the Dock. Is there any solution to this problem?
1
vote
1answer
21 views

Can I use a Early 2011 MacBook Pro 13“ charger with my Late 2013 MacBook Pro 13” with the MagSafe Adapter?

I bought a Early 2011 MacBook Pro 13" but eventually upgraded to a newer Retina Late 2013 13" model. I'd like to get another charger, but I'm curious if I could use the old charger that came with ...
1
vote
2answers
22 views

Charge MacBook with USB (Adapters?)

I want to buy an external charger, it has USB. Are there any adapters (including transformators, I think that might be needed, right?) so I can charge my MacBook with the external charger?
0
votes
1answer
21 views

Will this MagSafe power adapter work on my MacBook Air?

My MBA's model number is A1369. I bought this power adapter: 85W magSafe 2 Power Adapter. Model number A1424. I know it's not the ideal power adapter, but will it work on my MacBook without a ...
0
votes
1answer
830 views

A1208 2006 Intel iMac Power Supply “Power Good” voltage?

This might be a bit specific, but I am trying to test a trashed A1208 Intel iMac (Late 2006 17" Model). The power supply is dead (Fuse was blown, bypassed with a wire and bang poof a resistor and ic ...
2
votes
2answers
520 views

Prevent iPhone from charging when plugged into a battery powered MacBook Air

I would like to prevent my iPhone draining power from my MacBook Air while the laptop is not plugged in and relying on battery power. How would I do this? Note, there doesn't seem to be any "unpowered ...
0
votes
1answer
34 views

Power adapter green light blinking on - non genuine adapter

I recently acquired a new power adapter 85W for my macbook pro retina late 2013. I made sure the specifications matched the official Apple adapter and in fact I have not noticed any performance ...
0
votes
1answer
21 views

MacBook Pro does not power on sometimes

I have a MacBook Pro 15″ Late 2008 (5,1). Sometimes it just won't power on. It works fine. I shutdown, then when I go to turn no it just does nothing. Previously I removed the battery and the charger, ...
2
votes
5answers
491 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 ...
0
votes
0answers
44 views

What's a normal Voltage (mV) to expect for a MacBook Pro early 2011?

I have a 13-inch MacBook Pro, early 2011 MC700. What's a normal Voltage (mV) to expect in System Report → Hardware → Power? I can see that it goes up to 12153 when it's fully charged and it comes ...
4
votes
1answer
230 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 ...
0
votes
1answer
43 views

Options for Replacing 60w Magsafe Power Supply

For the second time in four weeks I've had to re-solder the mag safe cord back on to the power supply. This time, unlike the first, the cord broke on the negative terminal on the circuit board itself. ...
0
votes
2answers
111 views

Using 45W Power Adapter with MacBook Pro Retina 15

I would like to know if I am able to use a 45W MagSafe Power Adapter in my MacBook Pro Retina 15 with a MagSafe to MagSafe 2 Adapter. I am normally using the original one (85W MagSafe 2 Power ...
2
votes
2answers
6k views

Does having Bluetooth enabled draw extra power when no devices are connected?

I generally turn off Bluetooth on my Macs and iOS devices when I'm not actively using a Bluetooth device. My assumption is that this saves battery life, but I realize that I have no fact to back that ...
0
votes
1answer
34 views

MacBook shows it is charging when MagSafe is green

My MacBook currently shows this even though the MagSafe charger has a green light. Does anyone know why this is? If it helps I am on a MacBook Air late 2010 with 819 cycle counts, 4,995mAh ...
1
vote
3answers
453 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 ...
2
votes
3answers
2k 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 ...
1
vote
0answers
48 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
1answer
43 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
38 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
178 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:
2
votes
1answer
257 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
16 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?
1
vote
0answers
136 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
124 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
824 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
3k 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
233 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
731 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
150 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
47 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
96 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 ...
36
votes
10answers
58k 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
219 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
35k 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 ...