I recently found out that my MacBookPro11,4 is "leaking electricity" somewhere. At first it seemed like a minor tingle. Then i tried to see if it gets worse if i touched a good conductor (a radiator) and the laptop at the same time. It got a lot worse. From tingle to a continuous surge that for some could be quite unbearable.   How "normal" is this ? How dangerous is this to people? How damaging is this to the laptop itself? What exactly causes this? Is fixing this covered by standard warranty?
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I have no idea why. But apple have not earthed the stubbly plug for the macbook pro transformer. So on the short lead the only way the charger is earthed is when I touch it or the macs unibody which gives you a sort of vibrating feeling on your palms.  When I went to the genius bar to complain about it they said that it was completely 'normal'. Where their definition of normal is that every MacBook does it. I have had 4 MacBooks and all have done it.    The genius did say that he though he has seen a few earthed 3pin plugs. So my question is where can I pick one up? or how could we force apple to earth the stubby plugs and recall them?
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Generally when I hear the crack of thunder, my PC goes off immediately. Today I'm working though, and wondered - how bad is it to leave it on? If the power goes out, will it kill it?   I use a power strip - that protects it, right?
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My MacBook has been overheating for over a year now. More recently it has begun to perform alarms and automatic shutdowns.  Also on startup there is (a moment) where I see a black screen with source code of some sort before the screen resumes with the grey bootup screen.  Today I have installed Mac Fan Control, and realize that the fan still works on my computer, hopefully I can prevent anymore burning (smell) from the laptop. Previously I had smcFanControl but it stopped pushing the fan above 2000 so I just thought that my fan didnt work for a long time  I also had my laptop/fan cleaned with air so I dont believe there is any blockage recently.  I have a screenshot showing the current temperatures, I would like to know what temperatures are ideal, safe or average and I will do my best to prolong the life of my laptop by keeping my fans spinning above 2000+ and being more mindful and keeping Activity Monitor open!    macOS Sierra 10.12.5 (16F73) MacBook Pro (13-inch, Late 2011) Processor 2.4 GHz Intel Core i5 Memory 4 GB 1333 MHz DDR3 Graphics Intel HD Graphics 3000 384 MB
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I have found myself in situtations where the internal battery has been used frequently. How do I check its status without diving into the mountain of directories?  NOTE I need to know about the CMOS battery. not the laptop's power supply, so this isn't a duplicate of those questions
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Whenever my MacBook Air is connected to the AC power and I have my hands on the palm rest, I feel it passes some electricity to me. If I unplug it from the AC power it stops doing that.  This has recently became obvious, when other people can feel this tingling by touching my skin after I've been working for a while.  I have two questions:  1- Is this normal in unibody Macs?  2- Is this harmful for my health in the long run?
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I have an LCD monitor that is cracked. So far nothing leaks out but if something starts leaking should I be concerned?   I have searched and read everything from:     It is safe to be around and handle just don't eat it.   to     It is toxic and should be avoided!   So I ask which is it? Should I be concerned if I see leakage?
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Recently my Macbook Pro Retina Late 2013 has started to shut down unexpectedly while running on battery. I thought it was because of my CPU was too hot but it was not the case. When checking it further, I found that my battery status is "Service Battery". I used coconutBattery to check and found that the Full Charge Capacity of my Mac is insanely low. I could be sure that it was around 90% last week and suddenly now it dropped to 46.9% of the Design Capacity.    I tried resetting SMC like many other said but unfortunately, it did not work for me. One symptom I saw before having this issue is that my Macbook temperature was quite high. I could feel the obvious difference in temperature between my Macbook and others' at the office when touching my hand on it, I guess my Mac was about 10 degree Celsius higher than others.  Is anyone here had this issue before? Should I replace my battery completely? Is it possible to replace the battery only on this Mac, I think it is nonremovable?
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My Macbook Air 13", Mid 2011, got heated and is slow in working. I noticed that CPU Die temperature reaches 90° C, is that normal?  I've changed my fan recently but still get this issue.
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So, I got some laptop charger from my neighbor and I was thinking about to do something with it. Then one day I feel tiny shock from the output of the charger. I thought ac to dc filtering mechanism maybe shorted. Then I had tested other remaining charger to see if there was any AC current going on. And they all do the same. Is it normal to have flow some AC through DC ? Can I do something about it ? make it safer for work ? It does not feel like comfortable.
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Battery warning "Service battery". This warning have appeared in my MacBook Pro (2008) with Snow Leopard. Is there a way to find out what a reason of this warning, without apply to service centre?
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I recently got a desktop LED lamp, and I feel a "strange" slight vibration when touching the metal case. I found that other devices also have high voltage on their case.  What is the reason/trade-off to design the PSU that way? Are "real" transformers inefficient? Even if it's harmless, why is the high voltage connected to the metal case, and not just through insulated wires?    When I turn the lamp on, the setup in the picture measures the power line (220V) 214Vpp (59Vrms). When I also touch the metal case, the voltage drops down to around 30V.  AC adaptor:
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I'm not sure what to do here. I just moved into a building and my outlets are all 2 prong outlets. Here is what I know of for sure:   All the outlets are 2 prong outlets The bathroom outlet has the red/black reset/test switch. I'm guessing that means that the building is grounded? The building is off of power lines (not underground)   My fear is blowing my electronics. I am not sure what to do here to properly protect my electronics. I'm hoping that my outlets are grounded-ready or the such, but how can I know? What do I do here?
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I've got a fan in a laptop that occasionally makes some loud airplane-like noises.  It mostly happens about 10 seconds after booting up and lasts for 10-20 seconds.  It also occasionally happens when the computer is running, but very rarely.  Interestingly, it does not seem to happen when the processor is being used heavily.  The laptop does not have a discrete graphics card.  The fan is clean.  I'm not sure if the laptop is under warranty, but I trust my own skills much more than I trust the manufacturer (or the shipper).  Before I search for a matching fan and replace it, I thought I would see if it is safe to try any lubricants.  Are there any lubricants that are safe to use inside a laptop?  I don't want a fire or anything that will splatter and cause conductivity issues within the circuitry.
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I'm putting on my desktop computer on steel rack as usual. A while ago, when I touch the steel rack for seconds, practically I feel a tingling sensation, sort of electrical shock in my finders. After that I measured how voltage the steel rack has, the multi-tester meter indicated almost 50V by AC mode. Is this safe to touch or keep the PC on the position, or I should get away the PC somewhere electricity-safe? I'm not sure this site is suit for asking this kind of question, but I'm very worrying whether this is safe or not since this experience is my very first time. Thank you.
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I am sure many of you guys know the flashing folder icon which shows up when the Mac cannot find a drive to boot from. My 2017 MacBook Pro has this issue for some time now, but recently I found something interesting.   The MBP won't find the boot drive, as long as the battery level is at > 70%.   The Mac boots just fine at lower battery levels; no issues whatsoever. Now, the problem is, I don't want to run my MacBook via battery the whole time or keep on disconnecting the AC power when 70% is reached every time.   Does anybody have similar symptoms and did find a better solution? Do you think there is a hardware issue with my device?   I've been to the Apple store before (when I didn't knew this was connected to the battery level) and they couldn't find anything. They suggested I reinstall macOS, which of cause didn't change anything.  Edit: One detail I forgot to mention was that when I charge my MBP and close the lid, it crashes and gets really hot (fans turn on slowly). I'm not totally sure on this, but I think this also happens with lower battery levels.  Battery Info:
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This is not a problem at booting up. For a couple months now I'll be using my laptop when suddenly the screen dims to about 50% of normal. According to the brightness indicator the brightness is all the way up; I can make it dimmer, but not as bright as normal. The dimming isn't super even either, there are small areas of the screen that seem darker/brighter. In the past the problem easily goes away if I close the lid and reopen it... but now it's happening a lot and sometimes going completely black. Is this an easy/cheap fix? I'm traveling and can't do it myself. Is it worth bringing to the Mac store?  Thanks!
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Apple's  decision to convert all the ports on their 2016 MacBook Pro lineup to USB-C ports contributes to blur the difference between ports that supply power (such as a power adapters) and ports that can power external devices (such as USB keys, mice or other gadgets).    This made me think about the following scenario: you sit at a table where your laptop is plugged in on the right, and don't notice that it is plugged in, so you decide to charge it with a second nearby charger that is laying around (i.e. belonging to someone who lives with you and who recently sat at the same spot).  What would happen then?   Would the computer charge twice as fast, would one of the chargers be dismissed by the system (which one?), or would it generate a surcharge that would destroy the computer?  I couldn't find anything about this online, but since I am always trying to force a USB in the MagSafe charger of my MacBook Air, I think that I could easily end up making this kind of mistake.  Note: My question asks what happens when two chargers are inserted into a MacBook Pro, but I am also wondering what would happend if 3, or 4 chargers were inserted. Although this scenario is unlikely to happen by mistake, it would constitute an obvious vulnerability to an exposed device, i.e. in a public space.