KF207
Level 1 (4 points)
Windows Software

Q: Can't use mac os.

Whenever I turn on my mac I click on windows and I can use the windows os just fine, but when I try to use the mac os my computer just shuts down. How can I fix this?

MacBook Pro

Posted on May 14, 2016 12:07 AM

by Loner T,Solvedanswer
Loner T Loner T
Level 7 (23,828 points)
Safari
A:

If possible, can you provide a screen shot? The diskutil repairDisk did not show any errors. Do you have FileVault2 enabled or a firmware password set?

Posted on May 26, 2016 9:54 PM

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KF207

Q: Can't use mac os.

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  • by judysings,

    judysings judysings May 15, 2016 7:31 AM in response to KF207
    Community Specialists
    May 15, 2016 7:31 AM in response to KF207

    Hi KF207,

    I understand you are not able to start your Mac in OS X after installing Windows with Bootcamp.  The resource below will provide some troubleshooting steps for this issue:

     

    How to choose a startup disk on your Mac

     

    Use these steps to choose a startup disk with Startup Manager:

    1. Turn on or restart your Mac.
    2. Immediately press and hold the Option key. After a few seconds, the Startup Manager appears. If you don't see the volume you want to use, wait a few moments for Startup Manager to finish scanning connected drives.
    3. Use your mouse or trackpad, or left and right arrow keys to select the volume you want to use.
    4. Double-click or press the Return key to start up your Mac from the volume you selected.

    Restart in OS X from Boot Camp

    If you have started up your Mac in Windows using Boot Camp, you can use the Boot Camp system tray to switch your startup disk default back to OS X.

    1. In Windows, click the Boot Camp icon in the system tray.
    2. From the menu that appears, choose Restart in OS X.

    Start from OS X Recovery

    You can also start your Mac from OS X Recovery or Internet Recovery if your Mac was manufactured after 2011.

    To start your Mac from the Recovery System, use these steps:

    1. Start up or restart your computer.
    2. Hold down the Command and R keys on your keyboard until you see the Apple logo appear onscreen.

     

    Take care,

  • by Loner T,

    Loner T Loner T May 15, 2016 7:56 AM in response to KF207
    Level 7 (23,828 points)
    Safari
    May 15, 2016 7:56 AM in response to KF207

    Was OS X working properly before you installed Windows? Is this a new Windows installation?

  • by KF207,

    KF207 KF207 May 17, 2016 5:48 PM in response to judysings
    Level 1 (4 points)
    Windows Software
    May 17, 2016 5:48 PM in response to judysings

    I was able to enter recovery mode, but for some reason I wasn't able to reinstall the os, and when I tried to repair the disk, it couldn't be repaired.

  • by Loner T,

    Loner T Loner T May 17, 2016 6:06 PM in response to KF207
    Level 7 (23,828 points)
    Safari
    May 17, 2016 6:06 PM in response to KF207

    What year/model is your Mac?

     

    During the installation of Windows, your disk was converted from a GPT to an MBR disk, which will disallow OS X to boot, because it needs EFI. To inspect your internal disk, How to install OS X on an external drive connected to your Mac - Apple Support and boot from it.

     

    Be aware that you may be installing the shipped version of OS X rather than the current version. If it is older than the current version on your internal disk, it can cause further problems.

  • by KF207,

    KF207 KF207 May 17, 2016 7:49 PM in response to Loner T
    Level 1 (4 points)
    Windows Software
    May 17, 2016 7:49 PM in response to Loner T

    It's a 2013 Pro. The Mac OS was working fine before I installed windows and for a few months after I installed it. It just stopped working all of a sudden.

  • by Loner T,

    Loner T Loner T May 17, 2016 8:26 PM in response to KF207
    Level 7 (23,828 points)
    Safari
    May 17, 2016 8:26 PM in response to KF207

    If you boot into internet recovery, from Utilities -> Terminal, run the following two commands, copy the output, quit Terminal, start Safari, paste the output on this discussion.

     

    diskutil list

    diskutil cs list

  • by KF207,

    KF207 KF207 May 17, 2016 9:14 PM in response to Loner T
    Level 1 (4 points)
    Windows Software
    May 17, 2016 9:14 PM in response to Loner T

    -bash-3.2# diskutil list

    /dev/disk0

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:      GUID_partition_scheme                        *251.0 GB   disk0

       1:                        EFI                         209.7 MB   disk0s1

       2:                  Apple_HFS Untitled                185.1 GB   disk0s2

       3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3

       4:       Microsoft Basic Data BOOTCAMP                65.0 GB    disk0s4

    /dev/disk1

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:     Apple_partition_scheme                        *1.2 GB     disk1

       1:        Apple_partition_map                         30.7 KB    disk1s1

       2:                  Apple_HFS Mac OS X Base System    1.2 GB     disk1s2

    /dev/disk2

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:                            untitled               *524.3 KB   disk2

    /dev/disk3

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:                            untitled               *524.3 KB   disk3

    /dev/disk4

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:                            untitled               *524.3 KB   disk4

    /dev/disk5

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:                            untitled               *524.3 KB   disk5

    /dev/disk6

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:                            untitled               *524.3 KB   disk6

    /dev/disk7

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:                            untitled               *6.3 MB     disk7

    /dev/disk8

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:                            untitled               *2.1 MB     disk8

    /dev/disk9

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:                            untitled               *1.0 MB     disk9

    /dev/disk10

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:                            untitled               *524.3 KB   disk10

    /dev/disk11

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:                            untitled               *524.3 KB   disk11

    /dev/disk12

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:                            untitled               *1.0 MB     disk12

    -bash-3.2# diskutil cs list

    No CoreStorage logical volume groups found

  • by Loner T,

    Loner T Loner T May 18, 2016 6:33 AM in response to KF207
    Level 7 (23,828 points)
    Safari
    May 18, 2016 6:33 AM in response to KF207

    This looks usual. What are the installed versions of OS X and Windows?

  • by KF207,

    KF207 KF207 May 18, 2016 1:04 PM in response to Loner T
    Level 1 (4 points)
    Windows Software
    May 18, 2016 1:04 PM in response to Loner T

    Windows 8.1 and Yosemite 10.1 if I remember correctly

  • by Loner T,

    Loner T Loner T May 18, 2016 2:50 PM in response to KF207
    Level 7 (23,828 points)
    Safari
    May 18, 2016 2:50 PM in response to KF207

    Can you post the output of the

     

    fdisk /dev/disk0

  • by KF207,

    KF207 KF207 May 18, 2016 5:37 PM in response to Loner T
    Level 1 (4 points)
    Windows Software
    May 18, 2016 5:37 PM in response to Loner T

    -bash-3.2# fdisk /dev/disk0

    Disk: /dev/disk0 geometry: 30515/255/63 [490234752 sectors]

    Signature: 0xAA55

             Starting       Ending

    #: id  cyl  hd sec -  cyl  hd sec [     start -       size]

    ------------------------------------------------------------------------

    1: EE 1023 254  63 - 1023 254  63 [         1 -     409639] <Unknown ID>

    2: AF 1023 254  63 - 1023 254  63 [    409640 -  361602408] HFS+       

    3: AB 1023 254  63 - 1023 254  63 [ 362012048 -    1269536] Darwin Boot

    *4: 07 1023 254  63 - 1023 254  63 [ 363282432 -  126951424] HPFS/QNX/AUX

  • by Loner T,

    Loner T Loner T May 18, 2016 6:06 PM in response to KF207
    Level 7 (23,828 points)
    Safari
    May 18, 2016 6:06 PM in response to KF207

    Can you boot in OS X Safe Mode - Try safe mode if your Mac doesn't finish starting up - Apple Support ?

  • by KF207,

    KF207 KF207 May 18, 2016 6:24 PM in response to Loner T
    Level 1 (4 points)
    Windows Software
    May 18, 2016 6:24 PM in response to Loner T

    No it shut down when I tried to go into safe mode.

  • by Loner T,

    Loner T Loner T May 18, 2016 6:35 PM in response to KF207
    Level 7 (23,828 points)
    Safari
    May 18, 2016 6:35 PM in response to KF207

    Can you get to Single User Mode - OS X El Capitan: Start up in single-user mode ?

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