Emga
Level 1 (0 points)

Q: Changed system time after rebooting from Bootcamp

Hello

 

After a reboot from boot camp partition Windows 10. I have the wrong time, actually its always one hour later than it is.

 

Although in System Settings i have checked the "Get time from Appleserver" it does not refresh the time to its real value. Side note in Win 10 (BootCamp) the time is correct, so the difference is happening while rebooting in Mac OS.

 

System:

 

MacBook Pro early 2011

OS X El Capitan 10.11.3

 

Bootcamp

Win 10 latest version with all aviable Upgrades/Updates

 

What could be the problem?

 

Thanks for your help!

MacBook Pro, OS X El Capitan (10.11.3), MacBook Pro Early 2011

Posted on Mar 7, 2016 2:59 AM

by Loner T,Solvedanswer
Loner T Loner T
Level 7 (23,898 points)
Safari
A:

After you switch to OSX, does OSX Terminal command date show the same date-time as the menu bar clock?

Posted on Mar 9, 2016 2:32 PM

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Emga

Q: Changed system time after rebooting from Bootcamp

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  • by Lexiepex,Helpful

    Lexiepex Lexiepex Mar 8, 2016 1:07 PM in response to Emga
    Level 6 (10,477 points)
    Mac OS X
    Mar 8, 2016 1:07 PM in response to Emga

    Set the TimeZone correctly in OSX and in Windows.

  • by Emga,

    Emga Emga Mar 7, 2016 8:04 AM in response to Lexiepex
    Level 1 (0 points)
    Mar 7, 2016 8:04 AM in response to Lexiepex

    Thank you for your answer both OSs are set to correct Time Zone (UTC+1), so this could not be the problem.

     

    Also both System are set to sync the time with either time.apple.com or time.windows.com 

     

    EDIT:

     

    I tested it right now:

     

    • Shut down El Capitan with correct time
    • Start and boot into  Win 10 with correct time
    • Shut down Win 10 and start into El Capitan -> Gives me wrong time (one hour later) allthough the settings in El Captian show correct Time Zone UTC+1 and sync time over time.apple.com
    • Shut down El Capitan and boot in Win 10-> gives me correct time and correct settings

  • by Lexiepex,Helpful

    Lexiepex Lexiepex Mar 8, 2016 1:07 PM in response to Emga
    Level 6 (10,477 points)
    Mac OS X
    Mar 8, 2016 1:07 PM in response to Emga

    Do not forget to uncheck "set timezone automatically...."

  • by Emga,

    Emga Emga Mar 8, 2016 1:07 PM in response to Lexiepex
    Level 1 (0 points)
    Mar 8, 2016 1:07 PM in response to Lexiepex

    Thank you for your help, i disabled every automatic time set option in both OSs, but still when i reboot from Windows into Mac OS X the time is wrong, still exactly one hour later than actual time. Funny side note: it appears this is only happening on the way (reboot) from Win10 to OS X El Capitan.

     

    Dont know why, i think i need to live with it...

  • by Loner T,

    Loner T Loner T Mar 8, 2016 6:33 PM in response to Emga
    Level 7 (23,898 points)
    Safari
    Mar 8, 2016 6:33 PM in response to Emga

    Can you run the following two procedures and test?

     

    Reset the System Management Controller (SMC) on your Mac - Apple Support

    How to Reset NVRAM on your Mac - Apple Support

  • by Emga,

    Emga Emga Mar 9, 2016 1:25 PM in response to Loner T
    Level 1 (0 points)
    Mar 9, 2016 1:25 PM in response to Loner T

    Thank you for your answer, i did the reset of SMC and NVRAM but nothing has changed, if i boot from OS X into Win10 the time is correct, the other way around OS X shows me the wrong time (difference 1 Hr)

     

    Dont know whats the reason...

  • by Loner T,Solvedanswer

    Loner T Loner T Mar 9, 2016 2:32 PM in response to Emga
    Level 7 (23,898 points)
    Safari
    Mar 9, 2016 2:32 PM in response to Emga

    After you switch to OSX, does OSX Terminal command date show the same date-time as the menu bar clock?

  • by Emga,

    Emga Emga Mar 11, 2016 3:00 PM in response to Loner T
    Level 1 (0 points)
    Mar 11, 2016 3:00 PM in response to Loner T

    Sorry for my late answer.

     

    Yes the Terminal prompt the same date and time as the menu bar, so the wrong one.

     

    All automatic time sync is disabled, as suggest before in this thread. No synchro to any remote server is established at boot up (No VPN, no Dropbox, NO nothing...)

     

    Can it be that OS X and Windows use a different method/or date from where thy start counting? Similar to date and timestamps in Excel or Matlab? And the windows value gets stuck anywhere?

     

    Man this is tricky...

     

    It not that big of a deal, i just need to remember overtime to set the clock right, but kinda odd that it is not working.

     

    My suggestion is that Win10 is the guilty one, as i used Win7 and OS X Lion i never had this issue...

     

    Thank you for all your help

  • by Emga,

    Emga Emga Mar 11, 2016 3:02 PM in response to Emga
    Level 1 (0 points)
    Mar 11, 2016 3:02 PM in response to Emga

    I miss-clicked it is NOT solved !! I Repeat NOT SOLVED

  • by Loner T,

    Loner T Loner T Mar 11, 2016 4:03 PM in response to Emga
    Level 7 (23,898 points)
    Safari
    Mar 11, 2016 4:03 PM in response to Emga

    Both OS X and Windows use NTP. The only difference could be your Time Zone settings.

     

    In OSX Terminal, can your type date and post the output.

  • by Lexiepex,

    Lexiepex Lexiepex Mar 12, 2016 12:13 AM in response to Emga
    Level 6 (10,477 points)
    Mac OS X
    Mar 12, 2016 12:13 AM in response to Emga

    To have it complete:

    in Windows, go into Dos (Start->Dosprompt)

    and type Date (do not change it)

    then Time (do not change it)

    give both values here to LonerT

  • by Emga,

    Emga Emga Mar 12, 2016 12:56 AM in response to Lexiepex
    Level 1 (0 points)
    Mar 12, 2016 12:56 AM in response to Lexiepex

    So this is the output

     

    1. OS X before win10 was started

     

    Last login: Sat Mar 12 00:53:22 on ttys000

    Gabriels-MacBook-Pro:~ Gabriel$ date

    Sa 12 Mär 2016 09:19:55 CET

    Gabriels-MacBook-Pro:~ Gabriel$

     

    2. date and time from WIN 10

     

    Microsoft Windows [Version 10.0.10.586]

    (c) 2015 Microsoft Corporation. Alle Rechte vorbehalten

     

    C:\WINDOWS\system32>Date

    Aktuelles Datum: 12.03.2016

    Geben sie das neue Datum ein (TT-MM-JJ):

     

    C:\Windows\system32>Time

    Aktuelle Zeit: 9:44:32,44

    Geben sie neue Zeit ein:

     

    3. date after reboot in Mac OS X (actual Time is 09:46)

     

    Last login: Sat Mar 12 10:46:49 on ttys000

    Gabriels-MacBook-Pro:~ Gabriel$ date

    Sa 12 Mär 2016 10:54:49 CET

    Gabriels-MacBook-Pro:~ Gabriel$


    Hope this helps...

  • by Lexiepex,

    Lexiepex Lexiepex Mar 12, 2016 1:15 AM in response to Emga
    Level 6 (10,477 points)
    Mac OS X
    Mar 12, 2016 1:15 AM in response to Emga

    Fascinating....

    If you switch off every connection to the internet, does it do the same ??

  • by Emga,

    Emga Emga Mar 12, 2016 3:57 AM in response to Lexiepex
    Level 1 (0 points)
    Mar 12, 2016 3:57 AM in response to Lexiepex

    it is indeed fascinating, and it gets better, unfortunately

     

    When i disconnect completely from the internet, i keep the current time in Mac OS X even after reboot BUT Windows runs one hour late...

     

    I may have found the reason for this problem (not the solution) :

    My MacBook Pro (Early 2011) officially does not support the Win 10 64 Bit Version via Bootcamp, see here (scroll down) Use Windows 10 on your Mac with Boot Camp - Apple Support

     

    Fun fact: Beside the "Time Issue" Win 10 runs smoothly on this machine with Bootcamp. Seems like an failure on purpose ...

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