The electricity drained by a device

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1answer
3k views

Force hibernate (deep sleep) in OSX 10.8(.2)

How can you force the computer (in this case a laptop [rMBP]) into the "hibernate" state where it writes the RAM to the HDD/SSD so that the battery can last for the advertised 30 days. I know that ...
0
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0answers
746 views

Plugged faulty USB into Mac Air, won't turn on

I have an external DVD drive with an AC power input. I plugged it into a power source and then into my Mac Air (the generation released a year ago). The computer shut down immediately. When I ...
1
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0answers
141 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 ...
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 ...
2
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0answers
304 views

reverse magsafe adapter? (magsafe2 power to magsafe1 laptop)

I have some magsafe2 power cords. That's fine, but occasionally I need to loan power to an older laptop that has the magsafe1 port. I carry a magsafe2 adapter so I can steal power from them. But is ...
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 ...
0
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1answer
1k views

Macbook Pro Mid 2010 not powering up after smc update

Macbook Pro Mid 2010 after SMC update 1.7 shuts down and now by pressing power button front light turning on for a few seconds, optical drive makes it's usual noise but no activity on monitor happens ...
0
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0answers
311 views

Macbook randomly shuts down without on charge (even at ~90% full)

I'm having a real issue with my Macbook (white, late 2009 version, running Lion OS X). It was about since 2 weeks ago or so, my Macbook would just randomly shut down, I lost a couple unsaved files ...
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8answers
9k 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 ...
2
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1answer
493 views

No power through USB for Roland A-49

I just plugged my Roland A-49 to my MacBook Pro (Early 2011 2.3 GHz). The MIDI keyboard would have its power supplied via USB, but it has no power. The specification says it needs 98 mA current, which ...
0
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0answers
539 views

Quickly dim the iPod Touch by hitting the power button twice on the lock screen?

I've always wondered if this was a feature or not. When I'm on my iPod Touch's lock screen, then I hit the power button twice, the first hit will sleep the device, the second will wake it again but ...
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2answers
864 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 ...
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3answers
17k views

Can i use my old MacBook charger on my new Mac?

I have a 2011 15" MBP, that uses a 85W power supply. My old 2008 MBP 15" also has a 85W power supply, but I cannot get it to work. Shouldnt it? Its the same watt power, and the adapter fits.
0
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1answer
290 views

Macbook Air 1,1 power consumption

I have the original MBA, and I have extremely high power consumption - see the screenshot (screenshot got while TextEdit only was running) Is is normal for original MBA?
1
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1answer
406 views

know how many watts a USB device is consuming [duplicate]

I know it's possible to do some electric hack to know how much current a device is using... but that would be a 1 time usage so it would be a waste of money and parts. Is it possible to know that ...
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2answers
126 views

Electricity coming through screws, USB, and headphone jack on 2009 MacBook

I've seen some online threads and at least one StackExchange question on this, but the answers don't seem to apply to my situation. I have a 2009-vintage white 13" MacBook that's always been in great ...
1
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1answer
180 views

Will one power adapter work with all shipping MacBook Air and Pro as of March 2013?

I have a Late-2008 Macbook White (MacBook4,1) model, and my AC Adapter broke. Now I want to buy replacement adapter, but since I am going to upgrade to a MBP13 or MBP15 in the next 1-2 years, I want ...
0
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1answer
191 views

What are some effective ways to save power when using my MacBook Pro?

I have an Early 2011 MacBook Pro (Core i7, 8GB RAM) with Mountain Lion (OS X 10.8.2). What are some effective ways to save power? I am looking to maximise use of the battery - from a full charge - on ...
1
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1answer
139 views

Which Power Adapter is the correct one for Powerbook G4 15inch FW800 - 45watts or 65watts

I have a Powerbook G4 15inch FW800 with a 45watts Apple style power adapter. Recently it would not boot up. I removed the battery and it did. However after a shutdown, later on it did not boot up ...
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4answers
6k views

Does an iPad consume more battery power when there are multiple applications open?

Does an iPad consume more battery power when there are multiple applications open compared to let's say, having only one application resident in memory? If there are differences between the ...
1
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0answers
2k views

iPad 4 not charging solution with usb 3.0 dual ports Y adapter

Just recently picked up an iPad 4. Saw that it specifies "not charging" when plugged into the usb port. Saw that it is a common issue due to usb power. I have usb 3.0 ports on my desktop so I tried ...
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2answers
545 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
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1answer
285 views

Sleep button broken. How do I find out which part is affected?

The sleep/power button of my iPhone 4 is broken; it suddently didn't really "click" anymore and just hardly reacted on my actions. For some hours by clicking really firm it still worked, but then the ...
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0answers
584 views

Fluctuating voltage on Magsafe charger

I got two Apple Magsafe charges, one for which I needed to cut and rejoint the cables. The fix went well and now when I plug in the charger it works and charges my Macbook Pro. Though when I measured ...
0
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1answer
403 views

MacBook Pro battery charging stops early

I have a Mac Book Pro 15" over a year now. I'm having a problem with charging the battery. During work it stops charging and goes to battery powered mode. If I switch to a different power source it ...
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0answers
188 views

How to identify the 3 thermals sensor connectors from the mac mini motherboard?

I opened my mac mini to switch the DVD with another hard drive and I forgot to take a picture with the ways the 3 thermal sensors are connected. THeir codes on the mainboard look like: J5550 - left ...
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2answers
1k views

iMac + uTorrent energy saving

I want to keep my iMac on tonight and seed/leech torrents. I usually leave it there until, after 5/10 min or so, the iMac turn the monitor off. I can still hear the hd working. uTorrent has an option ...
10
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1answer
214 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), ...
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1answer
415 views

How to use new Macbook Air's power adapter with previous generation MacBook Pro?

I have a MacBook Air (Late 2012), which has the new Magsafe 2 power connector. I would like to use the power adapter with my 15" MacBook Pro (Mid 2010). Is there an adapter for it? A quick search on ...
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1answer
846 views

Can I still use a damaged Magsafe power cable?

My rabbit chewed on my Magsafe 2 power adapter. I can see the silvery wire where the rabbit peeled off the isolation yet it still works. Can I just duct tape it and continue using it or is there any ...
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3answers
9k 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 ...
8
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1answer
2k views

Phone-only mode on iPhone

Is there a way to switch the iPhone’s functionality to a phone-only mode. In this mode only incoming (and possibly outgoing) calls and SMS messaging would be activated. All other services (location, ...
6
votes
3answers
10k views

How do I locate applications that drain my battery on a MacBook Pro?

I purchased a new Macbook Pro and have since downloaded a ton of applications and add ins. I think some of these apps are responsible for draining my battery too quickly. How do I identify what ...
0
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2answers
1k views

Should I use an extension power cord instead?

I have the following Apple MacBook Pro Power adapter: 60W MagSafe PV85 Ouptput 16.5v--3.65A ADP-60AD T Model No. A1344 Instead of buying a Power Adapter, is it ok to buy an Extension power ...
2
votes
0answers
284 views

Pop-up notification (or notification center notification) for battery in OS X Mountain Lion

I don't have the battery/AC icon turned on because, for the most part, there's no reason for it to be there - I typically get cord-free 5 or so hours at a time, so it seems redundant. Still, ...
2
votes
2answers
5k 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 ...
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 ...
10
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2answers
4k views

Should I use the adapter or the battery?

I want to know when my MBP's battery was fully charged it's better to unplug my adapter and use my battery power or still let use adapter power? I somewhere read that when MBP's battery was fully ...
1
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1answer
898 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
1answer
572 views

Is grounding important?

Is the grounding wire forwarded to the Magsafe connector? There are these 2/3 pin adapters and it's so much easier to convert a 2 prong connector while travelling than the bulky three prong ones. I do ...
5
votes
1answer
1k views

Are the mid-2012 Macbook Air compatible with older MagSafe adapters?

Will the mid-2012 Macbook Air models be compatible with the MagSafe power supply of the previous generations?
1
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2answers
2k views

What is the wattage of my iPhone?

I am trying to make a transportable charger for iPhones, but before I can start this I need to know how much power my iPhone uses when I make an emergency call. If nobody knows this, I will be glad ...
2
votes
1answer
382 views

Can I use a foreign power cord to power my MacBook?

I have a MacBook Pro computer and I will be traveling abroad to Hong Kong for studies. The electric sockets and voltage are different than here in the US so I would have to use a converter but it is a ...
4
votes
1answer
85 views

Energy saver: do the battery settings apply during charging?

I have my Macbook pro 17 (early 2011, OSX 10.6.8) set to turn off the display at 30 minutes on AC, and 10 minutes on battery. I've noticed recently that if the battery is charging (the little battery ...
0
votes
1answer
787 views

Old MacBook power adapter on new MacBook Pro?

I have a 60W power adapter from my old 2008 MacBook. Can I use this power adapter on a new 13" MacBook Pro, which also came with a 60W power adapter? However the two power adapters have two ...
4
votes
3answers
5k 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 ...
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2answers
939 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 ...
6
votes
1answer
400 views

At what point do iPads stop displaying “not charging” when connected to power?

I am curious if anyone has measured directly or found an authoritative reference that documents at which point the various iPad will display charging and not "not charging" in the menu bar while ...
6
votes
3answers
2k views

Using my iMac in a country with a different power supply standard

We may be relocating to a different area of the world where the power standards and outlets differ considerably from what I've got here in North America. Is the power supply in my iMac ...
3
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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 ...