Hi, I just wanted to expand my windows 10 partition and stupid me decided not to google the correct way to do this and just thought I could use Disk Utility to  reduce the mac OS partition and then log into Windows 10 and use the Disk Manager to pick up the new empty segment and format it correctly for windows.

biggest mistake ever.  The Bootcamp partition is completely missing from startup when I hold the option key.  It still appears in Disk Utility though.  How would I go about getting it back?

I understand this question has probably been asked a million times but I can’t seem to get it to work.  I even tried to work around it using refit but that doesn’t want to launch either.

Below is some more information:

Scotts-MacBook-Pro:~ Scott$ sudo gpt -r -vv show disk0

gpt show: disk0: mediasize=750156374016; sectorsize=512; blocks=1465149168

gpt show: disk0: Suspicious MBR at sector 0

gpt show: disk0: Pri GPT at sector 1

gpt show: disk0: Sec GPT at sector 1465149167

       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  1070893240      2  GPT part – 53746F72-6167-11AA-AA11-00306543ECAC

  1071302880     1269536      3  GPT part – 426F6F74-0000-11AA-AA11-00306543ECAC

  1072572416   392574976      4  GPT part – EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

  1465147392        1743        

  1465149135          32         Sec GPT table

  1465149167           1         Sec GPT header

Scotts-MacBook-Pro:~ Scott$ sudo fdisk /dev/disk0

Disk: /dev/disk0    geometry: 91201/255/63 [1465149168 sectors]

Signatu 0xAA55

         Starting       Ending

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

————————————————————————

1: EE    0   0   2 –   25 127  14 [         1 –     409639] <Unknown ID>

2: AC 1023 254  63 – 1023 254  63 [    409640 – 1070893240] <Unknown ID>

3: AB 1023 254  63 – 1023 254  63 [1071302880 –    1269536] Darwin Boot

4: 00    0   0   0 –    0   0   0 [         0 –          0] unused     

Scotts-MacBook-Pro:~ Scott$ diskutil list

/dev/disk0 (internal, physical):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      GUID_partition_scheme                        *750.2 GB   disk0

   1:                        EFI EFI                     209.7 MB   disk0s1

   2:          Apple_CoreStorage Operating System        548.3 GB   disk0s2

   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3

   4:       Microsoft Basic Data BOOTCAMP                201.0 GB   disk0s4

/dev/disk1 (internal, virtual):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:                  Apple_HFS Operating System       +547.9 GB   disk1

                                 Logical Volume on disk0s2

                                 25314E04-6380-4DC1-95C7-0B574DBA68E8

                                 Unlocked Encrypted

 

 

and when I try to verify the volume:

Scotts-MacBook-Pro:~ Scott$ diskutil verifyVolume “BOOTCAMP”

Error starting file system verification for disk0s4 BOOTCAMP: Invalid request (-69886)

 

I’m really at a lost and googling the problem seems to run me around in circles

Hey guys,

Would really appreciate some help on this!

I used to successfully use bootcamp and have an extra partition so i could use Windows aswell, until my HD crashed and i had to take it to the Apple Hospital. When i got the computer back and restored my old backup Time Machine clone, i couldn’t create a new partition for Windows. It doesn’t let me get passed the first screen.

What happens is: I load up Boot Camp as usual, push Continue passed the Introduction screen, then i get a msg pop up that says:

The startup disk cannot be partitioned or restored to a single partition.

The startup disk must be formatted as a single Mac OS Extended (Journaled) volume or already partitioned by Boot Camp Assistant for installing Windows.

Then i push Ok and it goes back to the BootCamp introduction screen. I.e. i can’t get passed this msg.

I looked in Disk Utility and of course my internal HD already is Mac OS Extended (Journaled) so i have no idea why it isn’t being recognised as one partition.

What do i have to do to be able to install windows on this computer without having to format my entire Mac and installing everything again? I really need the exact clone of what i have right now. I do have an external HD for making backup clones using Time Machine though.

Some specs:

– Boot Camp Assistant version is 3.0.1

– Mac OSX 10.6.2 (yeah i guess i’m old school now)

– 2.66 GHz Intel Core i5, 4 GB RAM

– I have no other partitions currently, just my current mac one

Any questions just ask. I would love to resolve this tonight.

An iMac I have just died. It used Time Machine as a backup to an external drive. I’d like to resurrect the iMac’s contents on to an existing MacBook Pro I own. Does it make sense to partition the MacBook Pro’s hard drive and then migrate all data on the external drive to the partition? The MacBook Pro is running OS 10.11.1; the iMac ran an earlier version of El Capitan.

Hi there,

I’m desperately trying to create a partition to run Windows 7 on my Late 2013 27″ iMac.. I’ve followed all instructions up until actually creating the partition, it will work away for anything between 10 seconds and two minutes but ultimately come up with the error: “Your disk could not be partitioned. An error occurred while partitioning the disk”

I’ve been troubleshooting this all day, and have verified and repaired (well, I think it’s called first aid now thanks to El Capitan) multiple times but it still fails. Something else that is odd is that when choosing the partition size, it only allows me to use 32GB for the windows side (leaving 196GB free for OSX)..? If I drag the slider to the left it says ‘-989 GB’ for the windows size and ‘1218 GB free’ for the OSX side.. If I drag it further it increases in increments of 1000 in a similar weird. I’ve partitioned my macbook before with success, but for some reason this iMac isn’t so happy?

For those who will ask, the copy of Windows 7 is legit, and I have downloaded the correct support software and added it to the drive, but it feels like the process is failing far before the windows install. I can only think that it might be something to do with the fact that my iMac runs off of a fusion drive instead of just a hard drive, and that the two separate parts (SSD and HDD) make things awkward…? Maybe…? I don’t know…

I would really appreciate some help, as this has me stumped. My system specs are listed below.

iMac (27-inch, Late 2013)

Processor 3.5 GHz Intel Core i7

Memory 16 GB 1600 MHz DDR3

Startup Disk Macintosh HD

Graphics NVIDIA GeForce GTX 780M 4096 MB

My storage is a 3TB Fusion Drive.

Recently I accidentally merged a 100 gig partition back to my Macintosh HD disc, and now the disc has 100 missing gigabytes, though the capacity is still 1 TB.  Here’s an image to show what i’m talking about:

\

notice how the used and free space don’t add up..

I have been running boot camp with Windows for three weeks. Last week my MBP had trouble starting up on my Boot camp partition. Windows loading icon was visible, but the screen became black, and nothing happened. It sorted itself out after a bunch of restarts. But today it happened again, I tried to restart a bunch of times again… but after enough hard restarts, the Boot camp partition got swapped out with EFI. I used to have to boot options: OS X and Windows, but now I have OS X and EFI. I tried selecting EFI, and it gave me the blue screen saying “Your PC/device need repair etc…”

Anyone got any ideas? Should I post any output from terminal, would that help?

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      GUID_partition_scheme                        *500.3 GB   disk0

   1:                        EFI EFI                     209.7 MB   disk0s1

   2:          Apple_CoreStorage Macintosh HD            292.4 GB   disk0s2

   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3

   4:       Microsoft Basic Data BOOTCAMP                199.1 GB   disk0s4

/dev/disk1 (internal, virtual):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:                  Apple_HFS Macintosh HD           +292.0 GB   disk1

                                 Logical Volume on disk0s2

                                 EDE6AE5E-268F-49C5-82F8-87FF3638A606

                                 Unencrypted

My setup

MacBook Pro (Retina, 15-inch, Mid 2015)

OS X El Capitan 10.11.1

Windows 10 Enterprise x64 (Activated and legal)

I wanted to turn of fileVault and after the decryption process of the disk I was asked to restart the laptop, I did it and was presented with OS X utilities, which gave me options to reinstall the OS, use disk utility to repair disk, back up from time machine. Thankfully I have a bootcamp partition which is working, due to which I can acess the Macintosh partition from Windows. I didn’t have any backups to start with, but now since I can acess the entire filesystem, can I back it up in some hard disk (from windows [like time machine does]) and restart using OS X again and use that backup to get back my OS in it”s previous state? If yes, how do I make the backup?

Please help

Thank you

MacBook Pro late 2013 i7 512SSD

Boot Camp Assistant 6.0

O/S 10.11.2

genuine (paid for!) Windows 10 Home

Create boot USB exactly as instructed by Boot Camp Assistant (takes a very long time)

Re-partition Mac SSD in BC Asst. with 60 GB partition for windows

System reboots and Windows installer starts

Enter win key, everything working fine

When selecting which partition to install windows, select 60GB

Win installer says partition is not formatted correctly, so I use the format tool in the installer

Format tool seems to work but deletes the name of the volume – it was Boot Camp and becomes Untitled

Re-select 60 GB partition a installer says ‘failed to create partition’ or something similar

Installer refuses to proceed and only way out is to quit installer

Mac boots back into Mac O/S

Tried this a couple of times and always same result.

Anyone have any idea what I’m doing wrong? I’m following the Boot Camp Assistant instructions exactly…

While installing windows onto my mac (which successfully worked) I realised that I had accidently deleted my mac partition and most likely have given the storage to the window’s partition. After messing around with some stuff in recovery mode I can no longer load into windows, and whenever I start my computer there is now a folder with a question mark blinking non-stop. Here in recovery mode, I can somehow see all the files and applications I normally had on my macbook before **** hit the fan so I’m guessing I can still fix this without fully installing mac os x again. Oh, and also when I tried installing the mac os x it would not let me and the HD was greyed out. I have no idea how I can use disk utility to fix this so I need help on what to do, and how to get the sudo commands in terminal working so I can post them here to help you guys out.

Hello,

I recently just installed bootcamp on my rMBP 15″ (2015), and I was wondering if there was a way to access my Mac files/partition when I’m in my Windows bootcamp. When I navigate over to “Computer”, only the Bootcamp storage is shown, rather than both the Mac partition and the bootcamp storage. I’m trying to access a game I downloaded on the Mac partition in order to install it on Windows without having to redownload the whole game (very tedious). Help?

Hi all, I have run into what seems like a very common problem but cannot seem to fix my issue by referencing similar issues documented online. I installed Windows 10 on my bootcamp partition and it worked fine. I made the mistake of resizing my OS X partition and now my bootcamp partition is no longer bootable. Is there a way to repair my bootcamp partition as opposed to destroying it and re launching bootcamp assistant? Any help would be greatly appreciated.

I have a 2011 mac. 2.7 GHz Intel Core i5. 4 GB 1333 MHz DDR3. AMD Radeon HD 6770M 512 MB Grafics.

but none of that matters, except that im running OSX El Capitan.

Here is the problem:

THE SHORT STORY:

My hard drive looks like this right now:

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      GUID_partition_scheme                        *1.0 TB     disk0

   1:                  Apple_HFS UntitledHFS             763.4 MB   disk0s1

   2:                  Apple_HFS Macintosh HD            998.8 GB   disk0s2

   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3

/dev/disk1 (external, physical):

I have a complete backup of my hard drive and i want to delete ‘Apple_HFS UntitledHFS‘ (or disk0s1). The only solution i know is to boot into recovery mode and wipe the ‘mac hard drive’ clean and do a fresh recovery with my Time Mashine backup (thus deleting the Apple_HFS UntitledHFS partition)

I cant remove the partition in disk utility (grey minus sign) and i got this far erasing it and re formatting it as +HFS in terminal but it still just wont go away…

THE LONG STORY:

I wanted windows, used bootcamp, backed up my Time Machine to an external, did everything right, partition wouldn’t format in windows 8.1 setup, tried to use in-setup command prompt to format bootcamp partition as NTFS (huge mistake). After finding out later that my windows bootcamp partition was 99.9% of my hard drive i knew something was up. I backed up windows on a flash drive (probably a mistake) and booted into my (at the time working) Recovery Mode (windows wasn’t working correctly anyway with no sound and no brightness control; probably a driver issue that ill figure out later on). I then used Recovery Mode to create a factory setting account, and realized i actually wanted to do a ‘recovery from backup drive’, otherwise i would have to ‘merge’ all of my files back witch would be a pain. So I went back into recovery mode, wiped my hard drive (mackintosh HD) as a ‘OSX Extended (Journaled)’ then restored my hard drive from my external time machine backup. Now my mac is back but i have a boot partition labeled “Recovery” (for windows), and my ‘Macintosh HD’, which is sub divided with ‘Recovery’ under my hard drive named “WDC WD1001FALS-403AA0 Media”. I then looked online for a solution to erase the windows “Recovery” partition and move the free space to my macintosh HD.

Unfortunately all I found was ‘restart in recovery mode’ and start over with my back up, or use terminal.

I used terminal… because recovery mode no longer works for unknown reasons to me.

I erased Microsoft Reserved, I erased Microsoft Recovery (all by doing this: diskutil eraseVolume HFS+ Blank /dev/disk0s2 with both disk partitions).

I merged both the “blank HFS+” together, but I still get a grey minus sign in the partition window in Disk Utility because “Mediakit reports not enough space on device for requested operation”.

When i boot up Recovery mode (Command+R at startup) it loads for a little while (white screen with an apple sign and a spinning wheel), but then the computer just shuts off. I also tried putting a bootable “recovery mode assistant” on one of my flash drives and selecting it from start up, but it des exactly the same thing.

Thats the end of my story.

Now I realize that I’ve made some huge mistakes along the way, but i want to at least get windows bootcamp back and working properly (with my Mac os still working unlike last time), by getting recovery mode to work and erasing that now-empty partition.

Please help!

I created a regular partition of 175Gb through the redesigned disk utility. It was chugging along so I left it to its own devices and when I came back my notebook was powered down. I restarted it to find that my main HDD, which has a capacity of 500 Gb, was only showing the original partition, Macintosh HD, at ~325Gb. Clicking show info on the main hdd shows it has 3 children but I cannot see the partition I created. I tried turning on the ole debugger using the terminal but it doesnt seem to want to work.Any help is appreciated.

-Chribba

A couple of year’s ago I did an apple test on a new release of an operating system so they helped me put 2 partitions on my hard drive, one named Snow Leopard and the one I use, Yosemite. I would like to get rid of the Snow Leopard and just have Yosemite now and be able to use that space for only 1 partition. I’m not very technical so could someone please give me the easiest way to do this? Also, the last couple of weeks I seem to be freezing a lot. Mostly when I play Facebook app games…when I am on the maximized screen it sometimes just freezes ( says loading but never loads). Can’t get out of the screen because it is maximized so have to restart. My computer “escape” key also won’t work. What is the best cheapest way to get my computer back in shape. I’ve heard doing the permissions or restarting from a disk and using disk first aid no longer help much…Is there a free program that will look at my computer to see what could be wrong? Any help and “easy” explanation of steps is greatly appreciated! Thanks and Happy Holidays!

Hi all,

just bought a new iMac 27″ with 512 SSD. After bootcamp failed to install i did a reboot. Unfortunately bootcamp would not want to reinstall. Checking Disk Utility showed free space in the partition table. I can not delete it ( error code Couldn’t read partition map (-69876)) so i’m kinda stuck now with 1 gb off free space that not allows me to use it and prevents bootcamp from installing Message:

The startup disk must be formatted as a single Mac OS Extended (Journaled) volume or already partitioned by Boot Camp Assistant for installing Windows.

Around 100gb available for bootcamp but this cannot be merged to 1 disk as required…

diskutil list:

/dev/disk0 (internal, physical):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      GUID_partition_scheme                        *500.3 GB   disk0

   1:                        EFI EFI                     209.7 MB   disk0s1

   2:          Apple_CoreStorage Macintosh HD            399.4 GB   disk0s2

   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3

   4:                  Apple_HFS NewName                 99.4 GB    disk0s4

/dev/disk1 (internal, virtual):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:                  Apple_HFS Macintosh HD           +399.0 GB   disk1

                                 Logical Volume on disk0s2

                                 3DB995B0-D676-471E-839C-571916143CA0

                                 Unencrypted

Please advise what to do.

Many thanks.

Lennart

I have been reading boot camp threads for days now and trying different things, but I am finally staring a new one to see if I am having a unique problem.  I used to have Yosemite with boot camp all running quite happily.  I did the El Capitan upgrade and things were fine after that as well.  Recently I had to have the HDD replaced and even though I backed my data up, I wanted a fresh OS install, so I left the clean El Capitan install in place.  I launched BCA and immediately see this…

The only way I was able to get rid of that screen was to go into Disk Utility and manually create a partition formatted with MS-DOS (FAT)

After I do that, I can go into BCA and I don’t have the error anymore.  I check the first box to create the usb installer, the second checkbox gets checked automatically, and the third checkbox is checked so I leave it that way and click on.

It takes me through putting windows on the thumb drive with no apparent issues.  After that it prompts me to download the windows 7 support files, which I do.

After that, the third option is now checked in BCA, but it appears to only want to let me delete the FAT partition that I created earlier.  When click restore in this screen…

… then it tells me it has restored my mac to a single volume and exits.  If I relaunch BCA, I am right back to the first screenshot attached with the error.  I have tried leaving the FAT partition there and trying to reboot the machine from the flash drive, but so far no luck.

Would really appreciate any assistance, thanks!

Good morning, Yesterday i’ve cloned my MacBook Pro (Middle 2012 with osx 10.11.2) hdd into a Samsung SSD of the same size with clonezilla. I’ve cloned both the Osx partition and the Windows partition, but when i put the new ssd into the Mac i can boot only into the Osx partition. The Windows partition isn’t shown anymore after pressing the option key at startup. But when i boot into Osx i am able to see it and to to see the files inside it. So, there’s a way to show again the Windows partition and to boot it?

Thanks!

I haven’t used Bootcamp for a while but today i need to work on windows,it works fine but when i try to access my files on the Mac OS partition it says that it can’t read it and it must be formatted,but it’s not corrupted or something like that...

How do i fix this? i’ve serchead for some updates but i haven’t found anything.

Mac OSX,El Capitan,Bootcamp 6.0,Windows 10.

I updated MBP Retina Mid 2012 to El Capitan and then I upgraded my Win 7 Boot Camp partition to Win 10.  Version 6 of the Boot Camp utilities will not successfully install in Win 10.  I don’t known what to do.  Is there a way to install all the Apple drivers individually?  I have tried that but with only partial success.  I can only left click on the track pad.  Right does not work.

Do I need to go back to Win 7 and just forget it?

I would like to upgrade my mac pro to 10.11.12.   I am currently running 10.9.5 with a windows 7 partition (boot camp).  Will I lose that partition and option?