Having the same issue with my MacBook Pro retina 15" mid 2015
Turns off randomly - was brand new, from the box, on El Capitan which comes from the factory, downgraded to Yosemite and my MacBook Pro never had any issue again. only problem - have to use the Magic Mouse first edition, MM2 not compatible, which is annoying but less than the power issue
hope someone will find it useful, happy macbooking
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Sounds like you have a conflicting app or extension which is corrupting the systems memory. The fact that you down graded running the same apps tells me that. We have quite a few MacBook Pro's of different series and we haven't had any problems running OS-X El Capitan. MacOS Sierra has had some issues which I'm hoping this next update addresses.
I would recommend you do a bit of house cleaning as storage space in the retina models can be an issue. Clear out the old cache & log files, here's an app that makes quick work of it: Disk Doctor. Make sure you have 1/3 of the drive free if you have a 256 GB model, if you have a 512 GB or larger you only need to have 1/4 free.
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Dan,
thanks for your answer, but please note that the MBP was brand new, from the box, as mentioned in my previous post, sorry, I should highlight that, no apps were installed/factory default.
I've checked online for the solution - found one post with the fix - "downgrade to Yosimite".
since we don't have any official Apple service centre, i was following any ideas, luckily i found one.
now I'm just sharing the info, how i fixed my MBP.
Best,
vMofa.
by mofa_v
sofa, Thank you for sharing your story. Did you make sure your OS & Apps (default) where up to date?
Our base OS is El Capitan and we have over 300 systems running it. This summer we will be migrating the MacOS Sierra.
Trust me! I haven't seen what you encountered here. But then again, we don't use the first release of anything in our live environment which could be the difference why we didn't see it. That would lead me to believe you didn't update it after you turned it on.
While I can't tell you which update fixed the issue you encountered I do recommend maintaining the OS and your apps checking at least once a month for updates.
While I can understand your fears moving forward, maybe its time to take the plunge.
First make sure you have a good image of your config now. Using an external bootable drive, boot up under it then open Disk Utility and burn a full copy of your systems drive onto your external drive (so you can roll back if you still encounter problems). Then run the OS installer (El Capitan or Sierra) & run the updaters too!
by Dan
Dan,
yes, I did updated to the latest&greatest for that moment, as i was hoping it would/should solve the issue,
I was "working"on it 1 week (huge amount of time wasted re-installing the system, updating, etc...!!!), before the downgrade, while almost everybody was saying the same - "update to the latest, if still acting up - go to the SC."
Luckily, I solved the problem without opening the machine fixing any power supply issues or controllers, which gives me an idea that the issue was related to the OS.
for now i'm following one of the Golden rules - if something working fine - do not fix it. I'll stay on Yosemite as much as I can. the moment it's crashed, I'll try the latest and let you know the result.
cheers,
vMofa
by mofa_v