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117

In System Preferences > Energy Saver, check the box for "Prevent computer from sleeping automatically when the display is off" (on laptops, this is under the Power Adapter tab) In System Preferences > Security & Privacy, check the box for "Require password after sleep or screen saver begins" and set the delay in the dropdown menu to "immediately" Now, ...


64

The solution is to set ChimeOnNoHardware to true instead of setting ChimeOnAllHardware to false (note, No instead of All): defaults write com.apple.PowerChime ChimeOnNoHardware -bool true killall PowerChime


45

You can safely use the 85W adapter on any Mac, it will only draw as much power as it needs. The 45W adapter from the MacBook Air may just about manage to power your MacBook Pro but it won't charge it. It will not damage your Mac, but you may notice the battery may still deplete when using it. Here is the information, straight from Apple:


43

The solution for me was to use the adapter with a three pin extension cord. Then your notebook is grounded, and no more charges stay on the cover that shock you. :-). About steps 1-3 In steps 1 and 2, you reset the System Management Controller (SMC Reset) on a Mac that has a battery, which you should not remove on your own. The SMC manages hardware ...


43

There is a lot of misinformation in some answers. I will give the facts. No MagSafe adapter, when plugged into a mechanically matching receptacle on a MacBook/MacBook Pro, will cause an unsafe condition. This is a given for the systems to receive safety certifications. So no, a 60W adapter won't overheat when connected to a machine that needs an 85W adapter....


37

It's not ideal, but here's a solution. To prevent the laptop from sleeping when the lid is closed and you're running on battery, run the following commands: sudo pmset -b sleep 0; sudo pmset -b disablesleep 1 To re-enable laptop sleeping when the lid is closed and you're running on battery, run the following commands: sudo pmset -b sleep 5; sudo pmset -b ...


24

The iOS 10 update brought the new Raise to wake function to the iPhone 6S, 7, and SE. It's completely normal but can be annoying at times. You can disable it from Settings -> Display & Brightness -> Raise to Wake. Learn more about Raise to Wake and disabling it.


21

Sounds like you got a sticking ground pin. Just plug it out when connecting to the laptop horizontally (with more force) and stick it back it horizontally as well. Usually this is due to you removing the plug by lifting it (feels gentle but actually bad) rather than yanking it.


16

Apple has a program called MFi and detects if the cable has a certified chip inside. The chip just says that it's been officially 'Made For iOS.'


16

The USB-C plug is not the problem, but the charger is. It is underrated, so it will never manage to completely charge your battery while the Mac is in use, or supply enough when needed. With that said, you can use it to charge battery overnight to use it during the day. To verify it is best to take occasional look at the battery charge condition in ...


15

As of Mavericks, this is provided by the OS. Activity monitor has a tab devoted to displaying the energy use of running (and recently running) apps. Also, the battery icon shows applications that use significant energy on Mavericks and newer.


14

You have 2 scenarios as I see it: 1) Using a higher rated power supply than the original unit. This is absolutely fine. The power supply will never just automatically run at 100 % of it's capability, it will only supply what is requested. If you use a MacBook air that is supplied with a 45 W adapter with an 85 W adapter instead, it will still only draw ...


13

Under normal circumstances only one application is in the foreground and actually running. Of course what that app is doing can have a big effect on battery life. Other applications may be multitasking, but only in very specific circumstances - it's rare. Most apps will actually be doing nothing, so the answer is conditionally, "no". When you tap the home ...


13

I found the answer to my charging problem in another question: https://apple.stackexchange.com/a/301722/41731 Please make sure to upvote the answer I linked. Short version: yank the cord forcefully and horizontally out of the notebook. Repeat it a couple of times, until the orange light starts and it starts charging. Visit the link for more information. ...


10

Yes, you can use the simple adapter. If you read the tiny fine print on the plug end you see "110-240V 50-60Hz" which means it will work on most common electrical systems around the world without a transformer.


10

You could turn off Wi-Fi (Settings -> Wi-Fi) and cellular data (Settings -> General -> Cellular -> Cellular Data) to get a phone which works just like a phone. Possibly disable location services (Settings -> Privacy -> Locations Services) as well if you really want to extend the battery life. I do believe this would still allow local notifications, though, ...


10

You can bring your Apple Watch back to normal functioning mode by pressing and holding the side button, the same way that you do when you wish to power it on. This command will only work if you plugged the Watch in, or if there is sufficient battery juice available.


9

The Knowledgebase article Apple Computers and Displays: Powering peripherals through USB contains some general guidelines and illustrates using System Profiler (System Information in Lion) to provide information about the output (according to specifications) of a Macs USB ports. If you want to test the real world voltage output of a given USB port on an ...


9

Unless there is some reason to the contrary that I'm not aware of, yes, you can use your MacBook charger with your iPhone. The power adapter will only convert as much power as is drawn, and the iPhone will only draw as much power as it needs. (Note that it is not a good idea to charge your MacBook with an iPhone or iPad charger!)


9

Allan's answer is not correct, I was able to daisy chain my Mac. I am currently at a conference without my charger and I have daisy chained my Mac to another Mac (both USB-C 2017 Mac Book Pros). Both Mac's are closed, so there is not much variance in usage as both are idle. I opened the screens and checked the power level on both every 10 minutes. The second ...


9

Here's another solution since the others provided don't seem to be working for you. You can create an empty AIFF file to replace the default chime. The chime audio is located here: /System/Library/CoreServices/PowerChime.app/Contents/Resources/connect_power.aif I created an empty AIFF file using Adobe Audition. With SIP disabled, I backed up the original ...


8

System Preferences -> Security and Privacy -> Unlock the settings -> click the Advanced button -> Disable the logout option


8

iStat Menu offers to display both percentage and Time. http://bjango.com/mac/istatmenus/ When running SL, you could get the old free version. However, it does not contain the battery menulet: http://mac.brothersoft.com/istat-menus-2.0.html


8

As you've noticed, the iPhone switches off WiFi when it sleeps and uses 3G. This is by design. The 3G radio consumes less battery power. When does the iPhone switch back to 3G even if it has WiFi signal? As soon as you wake the phone it will being re-enabling sleep-disabled services like the WiFi radio. If you were previously joined to a wireless network ...


8

Not sure when it was first available, but on MacOS High Sierra 10.13.4 you can go to Apple (top left) > Lock Screen or press control-command-q to activate the lock screen. You should also do the first step in @daGUY's answer In System Preferences > Energy Saver, check the box for "Prevent computer from sleeping automatically when the display is off" (on ...


8

Since Apple doesn't publicly commit to power levels or even pin compatibility on the lightning connector, anyone interested in learning how hardware should be designed to work with Apple's dock connectors could choose to join the MFI program: https://developer.apple.com/programs/mfi/ As a developer, Apple will provide you with detailed hardware ...


7

This tingling can be felt on our aluminum 13" Macbook from 2008 and a 15" from 2011 if the Apple extension cord is not used on the power adapter. The V shaped slide part of the extension cord connector should have metal contacts under the edge of the V. These contact the metal button / mushroom shaped pin in the adapter, which is electrical ground. Make ...


7

It's perfectly OK to transport it while it's sleeping - I do this all the time. The disk is stopped and the only power draw is what is required to keep the memory contents (and the fading in/out of the power light). Any heat it generates during sleep is pretty much undetectable (in human terms). As long as nothing is connected to it, it shouldn't wake up ...


7

When measuring the usage of power adapters, it is important to keep in mind the efficiency of the PSU when making calculations. For PC builders, it's important to ensure that you choose a suitable PSU for the components you intend to use, to ensure it's big enough etc. As such, the rated capacity is shown as what the PSU is capable of delivering, rather ...


7

MacBooks are designed for close and go operation and you're not doing the system or hardware any harm by following the practice. That being said, there have been past issues with MacBooks not going to sleep properly when the lid is closed—the indicator being that the Mac is hot to the touch and the battery level is lower than you would expect when you remove ...


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