Josh Pa
Level 1 (8 points)
Windows Software

Q: Operating System not found

Hello Guys, Top of the morning to you!

 

I'm having an annoying issue that i hope you guys can help me with, i've been trying to solve this problem for the passed few days.

I get this annoying error message when booting my Mac Mini. "Operating System not found"

 

I got the error after installing Paragon NTFS to write and download files onto my Macintosh D:/ file which was inaccessable

at all, hoping it would work since i could use the extra 200GB! I have Windows 10 installed onto my Bootcamp C:/ hard drive and i think

OSX is installed onto the Macintosh D:/ drive? I have no idea to be honest since i've used Windows since i first got this. I really need to get

this fixed, since i use my home PC alot and have alot of sentimental stuff on my PC and dont want to chuck an extra 1,000$ on a new PC.

Posted on Apr 13, 2016 11:23 AM

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Josh Pa

Q: Operating System not found

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  • by Loner T,

    Loner T Loner T Apr 13, 2016 1:39 PM in response to Josh Pa
    Level 7 (23,828 points)
    Safari
    Apr 13, 2016 1:39 PM in response to Josh Pa

    Paragon, Tuxera and others can cause problems with boot ability of Windows. Can you post the output of following OSX Terminal commands?

     

    diskutil list

    diskutil cs list

    sudo gpt -vv -r show /dev/disk0

    sudo fdisk /dev/disk0

     

    The "sudo" commands will prompt for your password, and it will not be echoed back. You may also see a warning about improper use of "sudo" and potential data loss due to "abuse" of the command.

  • by Josh Pa,

    Josh Pa Josh Pa Apr 13, 2016 1:52 PM in response to Loner T
    Level 1 (8 points)
    Windows Software
    Apr 13, 2016 1:52 PM in response to Loner T

    Thanks for replying!

     

    Sorry about the delay, I'm using the help online feature and can only have 1 process open.

     

    Here's what i got when i ran the commands:

    -bash-3.2# diskutil list

    /dev/disk0

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:      GUID_partition_scheme                        *500.1 GB   disk0

       1:                        EFI                         209.7 MB   disk0s1

       2:                  Apple_HFS 02                      249.3 GB   disk0s2

       3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3

       4:       Microsoft Basic Data BOOTCAMP                222.0 GB   disk0s4

    /dev/disk1

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:     Apple_partition_scheme                        *1.3 GB     disk1

       1:        Apple_partition_map                         30.7 KB    disk1s1

       2:                  Apple_HFS Mac OS X Base System    1.3 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

    /dev/disk13

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:                            NO NAME                *7.9 GB     disk13

    -bash-3.2# diskutil cs list

    No CoreStorage logical volume groups found

    -bash-3.2# sudo gpt -vv -r show /dev/disk0

    -bash: sudo: command not found

    -bash-3.2# sudo fdisk /dev/disk0

    -bash: sudo: command not found

    -bash-3.2#

  • by Loner T,

    Loner T Loner T Apr 13, 2016 2:08 PM in response to Josh Pa
    Level 7 (23,828 points)
    Safari
    Apr 13, 2016 2:08 PM in response to Josh Pa

    In Internet Recovery, you do need the 'sudo' in front of the commands. Please remove the 'sudo' form the commands. It is tedious to use the Recovery Console and switch back and forth, and it is slow.

     

    You can switch to normal OSX for most of this work, if you like.

  • by Josh Pa,

    Josh Pa Josh Pa Apr 13, 2016 2:13 PM in response to Loner T
    Level 1 (8 points)
    Windows Software
    Apr 13, 2016 2:13 PM in response to Loner T

    Okay i ran the commands and got this:

     

     

     

    -bash-3.2# gpt -vv -r show /dev/disk0

    gpt show: /dev/disk0: mediasize=500107862016; sectorsize=512; blocks=976773168

    gpt show: /dev/disk0: Suspicious MBR at sector 0

    gpt show: /dev/disk0: Pri GPT at sector 1

    gpt show: /dev/disk0: Sec GPT at sector 976773167

          start       size  index  contents

              0          1         MBR

              1          1         Pri GPT header

              2         32         Pri GPT table

             34          6        

             40     409600      1  GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B

         409640  486847232      2  GPT part - 48465300-0000-11AA-AA11-00306543ECAC

      487256872     262144        

      487519016    1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

      488788552       1464        

      488790016  433592320      4  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

      922382336   54390799        

      976773135         32         Sec GPT table

      976773167          1         Sec GPT header

    -bash-3.2# fdisk /dev/disk0

    Disk: /dev/disk0 geometry: 60801/255/63 [976773168 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 -  486847232] HFS+       

    3: AB 1023 254  63 - 1023 254  63 [ 487519016 -    1269536] Darwin Boot

    4: 07 1023 254  63 - 1023 254  63 [ 488790016 -  433592320] HPFS/QNX/AUX

    -bash-3.2#

  • by Josh Pa,

    Josh Pa Josh Pa Apr 13, 2016 2:17 PM in response to Loner T
    Level 1 (8 points)
    Windows Software
    Apr 13, 2016 2:17 PM in response to Loner T

    It wont let me boot with OSX, it only gives me the option to boot with my BootCamp drive.

  • by Loner T,

    Loner T Loner T Apr 13, 2016 2:24 PM in response to Josh Pa
    Level 7 (23,828 points)
    Safari
    Apr 13, 2016 2:24 PM in response to Josh Pa

    If you shutdown your Mac, and power it back up and hold Alt/Option during power up, do you see a OSX selection? If yes, select it and boot. Your MBR looks incorrect. You have entry #2 flagged as bootable, but it should be entry #4.

     

    You will need to install GPT Fdisk - https://sourceforge.net/projects/gptfdisk/ - under normal OSX. Using Fdisk will not work.

  • by Josh Pa,

    Josh Pa Josh Pa Apr 13, 2016 2:25 PM in response to Loner T
    Level 1 (8 points)
    Windows Software
    Apr 13, 2016 2:25 PM in response to Loner T

    Okay i'll be right back with the results

  • by Josh Pa,

    Josh Pa Josh Pa Apr 13, 2016 2:40 PM in response to Loner T
    Level 1 (8 points)
    Windows Software
    Apr 13, 2016 2:40 PM in response to Loner T

    Alright i have bad news!

    It didnt let me boot with OSX

     

    I looked inside Disk Utility and this is the setup:

     

    Apple HDD

    02 (Macintosh file was renamed?) Format- Mac OS Extended

    BootCamp: Format- NTFS

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

    Disk1

    Mac OS X BASE SYSTEM




    I also tried  using Startup Disk inside OSX Utilities and that also only shows BootCamp as a boot option.

  • by Loner T,

    Loner T Loner T Apr 13, 2016 2:43 PM in response to Josh Pa
    Level 7 (23,828 points)
    Safari
    Apr 13, 2016 2:43 PM in response to Josh Pa

    Can you install OSX on an external disk - How to install OS X on an external drive connected to your Mac - Apple Support ?

  • by Josh Pa,

    Josh Pa Josh Pa Apr 13, 2016 3:07 PM in response to Loner T
    Level 1 (8 points)
    Windows Software
    Apr 13, 2016 3:07 PM in response to Loner T

    Yay!!! Finally some good news. Im able to install OSX to the 02 file. It's going to take ~2 hours. Ill get back here once it finishes. Thanks for sticking with me and helping me!

  • by Josh Pa,

    Josh Pa Josh Pa Apr 13, 2016 4:26 PM in response to Loner T
    Level 1 (8 points)
    Windows Software
    Apr 13, 2016 4:26 PM in response to Loner T

    Okay i installed the OSX and the file gptfdisk. Do i install gptfdisk onto the C:/ drive or onto the OSX directly?

  • by Loner T,

    Loner T Loner T Apr 13, 2016 4:31 PM in response to Josh Pa
    Level 7 (23,828 points)
    Safari
    Apr 13, 2016 4:31 PM in response to Josh Pa

    The GPT Fdisk utility works on both OS X and Windows. It is easier to work with, if installed under OS X.

  • by Josh Pa,

    Josh Pa Josh Pa Apr 13, 2016 4:34 PM in response to Loner T
    Level 1 (8 points)
    Windows Software
    Apr 13, 2016 4:34 PM in response to Loner T

    Finished installing it, what do i do next?

  • by Loner T,

    Loner T Loner T Apr 13, 2016 4:44 PM in response to Josh Pa
    Level 7 (23,828 points)
    Safari
    Apr 13, 2016 4:44 PM in response to Josh Pa

    Can you follow the steps in Re: Unable to boot into mac or bootcamp and rebuild your MBR? If you have questions, please ask.

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