My MacBook Pro (15-inch, Retina, Mid 2014, macOS 10.13.1) shuts down randomly.   It shuts down suddenly when on battery It shuts down a little more rare when connected to AC It works almost fine when in safe mode It works perfectly while I install macOS It works fine when I have an external screen connected and a YouTube video is playing there (it is my last solution to make work on this comp) but… It shuts down with external screen connected but no video playing. It happens in the moment of going to sleep mode. Or while it is in sleep mode, I don't know exactly. So maybe video playing helps in that it doesn't go sleep because of video.   Not working possible solutions, I tried:   reset SMC reset PRAM login with newly created user reinstall OS X over old OS X reinstall OS X entirely replace thermal paste. I found that one screw "hole" was unlinked from board. So my heat sink is fixed with 3 screws. But it touches bottom plate when it fixed. So it is kind of tight to CPU anyway. It can be a problem though. But why stress tests passing then?! Read next. monitor temperature (no overheating) monitor battery (no problems) run Apple Hardware Test (no issues) look at Console App. Logs are not saying anything important or like. On old OSX and newly installed. Logs just cut on time of shutdown and then line BOOT_TIME. Stress test CPU. 8 times yes &gt; /dev/null &amp; in Terminal. And all cores are 100% loaded. Temperature raises, fans in turbo mode. No shutdown, no problems. Stress test GPU. Open Webgl demo page in browser with 10000 fishes in awuarium. No problems.   Some lasting ideas:   Replace battery (not easy and fast as I need. A lot of work pending) Go to Apple and leave my only computer for unknown period of time. And I have no warranty of course. And I Googled a lot of stories when Apple couldn't find a issue and people had to replace main board for big money and time. Very bad. Buy new computer. A bit difficult for me now. I have read in some places, that this problem doesn't appear in Windows in Boot Camp! I even downloaded Windows 10 to try, but not yet. Anyway I need my favourite macOS, not Windows. Somewhere I read that it is some problem because of low voltage mode on CPU. It causes some 'unstable' regime in CPU and so system halts. It was only little info about that. It seems like real path to solution. But I don't know how to investigate this more.   A little History   2 months ago: I changed battery with one from aliexpress (china market). It was described as OEM Apple. It is quite the same and it detects with coconutBattery as Simplo manufacturer. I Googled and they say it is like OEM. 1 month ago: I have replaced my charger cord with one from fault charger. With MagSafe 2 connector.   The beginning  I took my MacBook to the bed and it shut down unexpectedly. It was like screen gone black, but backlight on. Then fans went full throttle slowly. And then it shut down completely. I pressed power btn and it started as usual. No messages. No warnings.  Then it worked for some time (maybe half an hour) and story repeated.  I decided that it is overheating because of bed. Took it to the desk. And problem repeated in some time. I began to google this hard. And play with problem to nail it down.   In the process I found that it works fine in Safe Mode (almost, but I had couple of crashes even in safe mode) It works fine when I reinstall macOS. All long 2 hours of downloading and 1 of installing it worked. After long google I found that it works better with external screen connected.  Current situation  So to recap. MacBook is failing almost always, except when I have external screen and video on it.
121516
I have a MacBook Pro 15" (mid 2014, running Sierra). Recently, it has started black screening and shutting off shortly after, after a few minutes' use—let's say 3 to 10 minutes. The screen will go black but the LCD backlight will remain on for about 5 seconds, then the laptop will completely shut off.  I have reset PRAM and the SMC. Things I have determined:   The built-in hardware test passes Problem is not tied to my user account (occurs when I'm logged in to another freshly created user) Problem is not tied to my OS installation (I wiped and re-installed) Problem does not manifest itself in Safe Mode or when booted into Windows 10. (Also didn't manifest during OS X re-installation.) Problem does not seem to be overheating: I can game with no issues on Windows, graphics performance and fans are fine.   This behaves like a classic overheating problem, but I'm stumped due to some of the weirdness of it not being an issue in safe mode or Win 10. Any thoughts?
116181
I have a new , resolution of 2560 x 1080, connected via DisplayPort to my 2012 MacBook Air 13" via a  that reportedly does have pin 20 wired correctly. I had previously tried connecting via HDMI, but as the manual for the display indicates, Macs are apparently unable to use the full native resolution when connected via HDMI.  A negative experience I'm having is that, when the MBA goes to sleep, the display appears to disconnect. This is noticeable only when waking it: the extra screen blanking of the display automatically reconnecting is almost imperceptible, and would otherwise be of negligible consequence, except for the result that all of my windows that were on that display are resized to fit on the MBA's built-in screen's resolution.  So, I find myself having to constantly re-maximize or rearrange windows whenever I walk away long enough for the screensaver to turn on and/or the computer goes to sleep. This is really aggravating, as I do arrange my windows quite particularly.  My options are seemingly thus:   Replace cable - maybe this is a manifestation of the pin 20 problem, but the display does awaken, just dis/re-connects annoyingly. Replace monitor - maybe something is wrong with this unit or this model?   I don't have another DisplayPort monitor easily accessible, but I might be able to borrow one or at least find one I can use in a store just to demonstrate that it's a DisplayPort or OS X problem and not a unit/model problem.  Tweak something in OS X - maybe there's a setting that I can alter that will disable this behavior, without having to disable screensaver or sleep. Suggestions welcome! Replace MBA - I'm already planning to pick up a new Macbook Pro this month, but I don't know if I'll get it in time to be within the display's return period, should I decide to return the display. I have a feeling this is not a reliable solution, because it's unlikely that the new machine wouldn't exhibit this behavior unless the behavior would change between Thunderbolt and Thunderbolt 2. ??? - this is where you ingenious answerers come in.
71965
When I open my MBP at the morning, I can feel the clicks for around 30 seconds, and then it's still functioning but without the click feedback. kind of goes to silent clicking mode. The built-in MBP trackpad works fine and I've another trackpad2 at the office that works great. Tried:  Turn it on and off. Connent with cable and without. Removed from connected devices and re-add it. Went through all the possible checkboxes on Trackpad + Accessibility settings.
52345
I am using my MacBook pro 15" 2016 everyday and attached to it I have got a DELL Monitor 25" QHD. In order to use the monitor as main screen my MacBook pro needs to be plugged in charging all the time.  Will the battery of the MacBook deteriorate because of this?  Thanks
60174
I'm really hoping someone here can help me, as I'm getting pretty frustrated with my macbook now. I have a late 2011 model 15" macbook pro running OSX 10.9.5 that refuses to connect to Internet on my home network. I have the same problem whether it's WiFi or through ethernet cable, I have full signal but not getting online. Every other device connects fine; android phones and tablets,xbox one, iPhone and other macbooks, all online and browsing the net. I have had no problems connecting to other networks with my macbook pro before and I just tried at a friend's house to check, with no problems. A little something, that may be a clue to someone: when I open network diagnostic tool, my macbook pro connects for something that seems like a microsecond and it tells me I'm connected to Internet and everything seems fine. My IP is 192.168.0.5 subnet mask 255.255.255.0 and IPv6 is set to automatic. None of the options are checked under the proxies tab. Now I've tried the following, in different order and a number of times, to no avail:   Renewing/turning off&amp;on/inputting manually DHCP.  Restarting/resetting the router and the macbook.  Turning WiFi on/off. Remove &amp; add services (WiFi &amp; ethernet). Checked and copied all network settings from another macbook pro that's connected and online on my network. Ran network diagnostic and assistant tools Duplicated/removed/added location Removed the /Library/Preferences/SystemConfiguration folder. Removed network password from keychain.      I've tried other things too, but can't remember what else right now.  Response from ifconfig en1:  en1: flags=8863&lt;UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST&gt; mtu 1500              ether 28:cf:da:e6:95:0a              inet6 fe80::2acf:daff:fee6:950a%en1 prefixlen 64 scopeid 0x5               inet 192.168.0.5 netmask 0xffffff00 broadcast 192.168.0.255              nd6 options=1&lt;PERFORMNUD&gt;              media: autoselect               status: active    I'm praying that someone out there has the magic words or the 2-click solution for me, but I would be grateful for a long thorough guidelines to solve it too! &lt;3        Regards Trond
111131
Is there any way to prevent my MacBook Pro from sleeping when I close the lid on macOS Sierra? I used to use NoSleep on OS X El Capitan; unfortunately it stopped working properly after Yosemite and I've heard that on Sierra it causes problems, so I don't want to install it and potentially cause damage.  Does anyone use anything that they personally have used that prevents MacBooks from going to sleep when the lid is closed on macOS Sierra?
12483
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 (i.e. by body is acting as a conductor). I contacted apple and I was told to perform the following steps:  Shutdown  hold ⇧+ctrl+⌥+power for 10 seconds  wait 30 seconds then hold ⇧+ctrl+⌥+R+power (Let the Mac reboot three times with that apple tone, then let go. The Mac reboots again.)   This did not fix the problem and I was not told what these steps were supposed to do. They have asked me to purchase a three pin version of the adapter and see if that fixes my problem. My last MacBook Pro was giving pretty severe jolts towards end of life. Hence a bit concerned. Question  Has anyone here experienced such a problem?  Is anyone aware of what the above sequence of steps supposed to do?  Also, will this damage the Macbook in some way?
42766
I am attempting to boot up my 2009 MacBook Pro, but when it starts it immediately shows a white screen with a 'question mark folder' — it keeps blinking until the computer shuts down (unless I keep it in the charger, then it just goes on).  I have tried to do the start up whilst holding down the option/alt button, and only the arrow comes up. I don't have the startup system disk (or any other) but the system has been updated to OS X Mountain Lion from the Mac App Store.  Before this, there had been other problems: when I deleted things they didn't go in the Trash but instead it looked like it just deleted it completely. After some time it wouldn't save or download, saying there wasn't enough space (even though I deleted items).
90569
I have a late 2013 27" iMac running  Yosemite, and it randomly shuts off every now and then. I tried everything Reset SMC. Diagnostics, reformat Macintosh HD but still occurs and running out of options.
55369
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 active forever. I tried disconnecting all USB peripherals connected - it did not help.  Any ideas?
108600
I wanted to ask, what to do if MacBook Pro 2017 uses more wattage than the charger can give? Why I am asking this or thinking this might be a problem? I tried to play some games on BootCamp (playing games on MacBook is another discussion, no hate please) on settings where I got 60FPS without lag but the problem is that my battery is discharging at the time I am playing. I can not recognize the problem on macOS though.  If I bought the mac couple days ago, first they gave me fake charger which f*d up my mac and wouldn't charge at all. Still can not believe that I buy new Mac and get fake charger with it. Then I went back to the store and asked for new Original charger which I then got. I can not see any more problems than the above I described.  Can anybody tell me what to check, what to do, who to contact with? Any help is much appreciated.
32244
My computer reboots, seemingly completely at random, about once every week to two weeks but has occasionally gone months. It just goes from running fine to the POST with no error messages or anything and doesn't seem to be due to heat or usage as it's happened a couple of times when the computer has booted just a few moments ago and is idling. It's been happening for as long as I've had this computer, almost two years. It's happened in both Vista and Windows7.  I strongly suspect it's a hardware problem. But due to the rareish and random nature of the crashes my normal strategy of just removing hardware until the problem stops isn't really practical. My guess would be Power Supply, Ram, or Motherboard. But I just don't know how to test an issue this random and want to figure out how to confirm which it is before I go replacing things. So is there some software or hardware that can be used to test these sorts of errors? I did run memtest86 for about 8 hours without finding any issues. And the power supply is more than capable of running my system.
7340
I've been fiddling with my new Haswell macbook air (with Mountain Lion), and there's a difference between the "energy saver" settings on my macbook vs my 2011 iMac. On my iMac, there's a "Computer Sleep" as well as a "Display Sleep" setting, but the macbook air only has "Display sleep":    When I don't use the computer for an hour or so, I want the display to go to sleep, but the computer should still be on, and shouldn't e.g. disconnect me from my chat sessions. How can I do this?  Thanks for your help.
32570
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!
106148
My graphics card has malfunctioned and is preventing my MacBook Pro (2011) from booting.  Based on my research I will have to otherwise have the logic board replaced.  The defective ATI graphics card is preventing my MacBook Pro from booting because it gets stuck on a gray screen sometimes even when using the recovery CD.
20431
Every time I close the lid of my Macbook Air, it turns off and I have to manually start it later when I open the lid again.  It also doesn't persist some of my settings such as volume level, desktop layouts (order of screens and which applications are full screened), and command line PATH changes such nvm's currently used node version.  Kind of a "you don't know what you don't know" situation. I'm not sure what to terms to use to search for this kind of behavior.  Edit: Adding some extra information as requested. I am on the following:   13-inch Macbook Air from Early 2014 Mac OS X El Capitan (10.11.6)   In System Preferences > Energy Saver > Battery, I have "Put hard disks to sleep when possible" checked and "Enable Power Nap while on battery power" unchecked.  I've looked through other potentially relevant areas of System Preferences and haven't found anything that works. I've done some Googling, but haven't found anything that is related and I'm unsure of what other terms I could use to search.  Edit 2: The issue seems to have been resolved. There's nothing in particular that I tried that worked, but it's resolved now. Thanks for reading and responding!
85169
My mid 2009 MacBook Pro has been repeatedly shutting down shortly after turning it on. It won't stay on. Where do I go for help? I haven't tried anything since it won't stay on.