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I re partitioned my mac drive using Yosemite before doing a clean install. and After I installed Windows 8.1 on Boot Camp.
My problem is Windows does not see Macintosh yet Disk Management can see the partition but no drive letter and cannot assign drive letter.
I have File Vault turned off.
Please Advise, Regards
MacBook Pro (Retina, 13-inch, Late 2013), OS X Yosemite (10.10)
Yosemite logical volumes cannot be read on Windows bootcamp anymore since they are not HFS+ volumes but they are now CoreStorage. Till Bootcamp is updated with drivers to allow read access to CoreStorage HFS+, you have lost functionality by upgrading to Yosemite. 😟.
You can verify this on the OS X side by running diskutil cs list in OS X terminal. If it returns any output, Windows cannot read such volumes.
Guys!
Actually, you can REVERT the "corestorage" volume back to HFS+. Even on new macbooks.
I bought a brand new retina mac with Yosemite preinstalled (not upgrade) and was abel to revert.
Run
diskutil cs list
And check the last "Logical volume" in the output. If it says "Revertible YES" this means you're saved. Again, it says so even on brand new Yosemite machines from Apple Store (bought mine this April, 2 weeks ago)
UPDATE: Oh, I see "creativeprogramming" has already covered this. Follow his answer.
Terrific post, sorry to hear about your i7 turbo issues. I'm hoping you can help me with terminal which I know little about. I've only ever executed a few baby-step terminal moves, and in my mind's eye I'm imagining I could brick my machine with an error. So far I've done everything on your list except the final move - the # 6) diskutil corestorage revert <UUID>. I located my Logical Volume "UUID" (that string of 32 or so letters & numbers to the right, I'm guessing...) and found the 'Revertible:Yes' text. In the # 6 move I suspect I do NOT include the brackets <> right? Finally - is this mod reversible? Do we lose any functionality from going back to HFS+ from Core Storage - are there any disadvantages? I not really all that concerned - mostly curious. Thanks in advance for your remarks - Cheers
You do not use "<>". These are used to indicate a user-specific item to be used. If it is revertible, you can. It is not always the case that CS volume is revertible.
It is a reversible modification. You can use diskutil cs create to go back to a CS volume. CS has advantages, where you can add disks and remove disks on the fly. HFS+ can be read on the Windows side, but I expect the new OS to provide a CS read-only driver with W10 release.
Problem.
It took me a while, but I finally pulled the trigger on this move and now I'm locked out of my Windows side. If I restart from OS X side holding down alt/option key I can see both drive icons BUT the Windows one is now called EFI boot and clicking it only brings up the Restore interface.
Any chance you can help me fix or undo this?
Right before I rebooted I copied the Terminal text:
MacBook-Pro:~ LDDS$ sudo su
Password:
sh-3.2# diskutil corestorage list
CoreStorage logical volume groups (1 found)
|
+-- Logical Volume Group BC92620B-F228-41B5-A6A4-A053945A3C24
=========================================================
Name: Untitled
Status: Online
Size: 374418034688 B (374.4 GB)
Free Space: 18903040 B (18.9 MB)
|
+-< Physical Volume 2B580042-A6BE-4731-9D96-746227AAEE7D
| ----------------------------------------------------
| Index: 0
| Disk: disk0s2
| Status: Online
| Size: 374418034688 B (374.4 GB)
|
+-> Logical Volume Family 1E6CBC4E-6AD6-49B6-A1EB-1CD7AEE18E6A
----------------------------------------------------------
Encryption Status: Unlocked
Encryption Type: None
Conversion Status: NoConversion
Conversion Direction: -none-
Has Encrypted Extents: No
Fully Secure: No
Passphrase Required: No
|
+-> Logical Volume 2940A4A5-9AB6-4D86-8E35-E96831159A9A
---------------------------------------------------
Disk: disk1
Status: Online
Size (Total): 374046810112 B (374.0 GB)
Conversion Progress: -none-
Revertible: Yes (no decryption required)
LV Name: Untitled
Volume Name: Untitled
Content Hint: Apple_HFS
sh-3.2# diskutil corestorage revert 2940A4A5-9AB6-4D86-8E35-E96831159A9A
Started CoreStorage operation on disk1 Untitled
Switching partition from Core Storage type to original type
Reclaiming space formerly used by Core Storage metadata
Even though the disk is now fully reverted, you should reboot soon to re-mount your reverted disk from the actual original partition
Removing Physical Volume
Destroying Logical Volume Group
Remounting former Physical Volume as normal disk
Core Storage LV UUID: 2940A4A5-9AB6-4D86-8E35-E96831159A9A
Core Storage disk: disk0s2
Finished CoreStorage operation on disk1 Untitled
sh-3.2#
Can you post the output of
diskutil list
sudo gpt -vv -r show /dev/disk0
sudo fdisk /dev/disk0
So kind of you to assist.....
Last login: Mon Aug 24 18:35:52 on console
Ls-MacBook-Pro:~ LDDS$ diskutil list
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *500.3 GB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_HFS Untitled 374.4 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
4: Microsoft Basic Data Windows 125.0 GB disk0s4
Ls-MacBook-Pro:~ LDDS$ sudo gpt -vv -r show /dev/disk0
Password:
gpt show: /dev/disk0: mediasize=500277790720; sectorsize=512; blocks=977105060
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 977105059
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 731285224 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC
731694864 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
732964400 464
732964864 244140032 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
977104896 131
977105027 32 Sec GPT table
977105059 1 Sec GPT header
Ls-MacBook-Pro:~ LDDS$ sudo fdisk /dev/disk0
Disk: /dev/disk0 geometry: 60821/255/63 [977105060 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 - 731285224] HFS+
3: AB 1023 254 63 - 1023 254 63 [ 731694864 - 1269536] Darwin Boot
4: 0C 1023 254 63 - 1023 254 63 [ 732964864 - 244140032] Win95 FAT32L
Ls-MacBook-Pro:~ LDDS$
Let us try the simple fix first on the MBR. Please ignore i386 MBR error message, but not any other messages.
sudo fdisk -e /dev/disk0
p
setpid 4
07
flag 4
p
w
y
Reboot into OS X and try to switch to Windows using System Preferences -> Startup Disk -> select Bootcamp -> Restart.
Once in Windows, run Disk Management and post the layout of Disk 0.
Last login: Tue Aug 25 07:06:21 on console
Lionels-MacBook-Pro:~ LDDS$ sudo fdisk -e /dev/disk0
Password:
fdisk: could not open MBR file /usr/standalone/i386/boot0: No such file or directory
Enter 'help' for information
fdisk: 1> p
Disk: /dev/disk0 geometry: 60821/255/63 [977105060 sectors]
Offset: 0 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 - 686363352] HFS+
3: AB 1023 254 63 - 1023 254 63 [ 686772992 - 1269536] Darwin Boot
*4: 07 1023 254 63 - 1023 254 63 [ 688044032 - 289060864] HPFS/QNX/AUX
fdisk: 1> setpid 4
Starting Ending
#: id cyl hd sec - cyl hd sec [ start - size]
------------------------------------------------------------------------
*4: 07 1023 254 63 - 1023 254 63 [ 688044032 - 289060864] HPFS/QNX/AUX
Partition id ('0' to disable) [0 - FF]: [7] (? for help) 07
fdisk: 1> flag 4
Partition 4 marked active.
fdisk:*1> p
Disk: /dev/disk0 geometry: 60821/255/63 [977105060 sectors]
Offset: 0 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 - 686363352] HFS+
3: AB 1023 254 63 - 1023 254 63 [ 686772992 - 1269536] Darwin Boot
*4: 07 1023 254 63 - 1023 254 63 [ 688044032 - 289060864] HPFS/QNX/AUX
fdisk:*1> w
Device could not be accessed exclusively.
A reboot will be needed for changes to take effect. OK? [n] y
Writing MBR at offset 0.
fdisk: 1>
Sorry - I have to interrupt with a question - I am inclined to wipe the drive (at this point it isn't a big deal as I've saved everything) but I don't know if wiping the drive restores the changes made via Terminal. Does a wipe & clean install restore everything to 'factory' settings?
Why are
Ls-MacBook-Pro:~ LDDS$ sudo fdisk /dev/disk0
Disk: /dev/disk0 geometry: 60821/255/63 [977105060 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 - 731285224] HFS+
3: AB 1023 254 63 - 1023 254 63 [ 731694864 - 1269536] Darwin Boot
4: 0C 1023 254 63 - 1023 254 63 [ 732964864 - 244140032] Win95 FAT32L
and (this is from the 'p' command before the flag command was executed)
Disk: /dev/disk0 geometry: 60821/255/63 [977105060 sectors]
Offset: 0 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 - 686363352] HFS+
3: AB 1023 254 63 - 1023 254 63 [ 686772992 - 1269536] Darwin Boot
*4: 07 1023 254 63 - 1023 254 63 [ 688044032 - 289060864] HPFS/QNX/AUX
different?
1. Do you have two disks with Bootcamp with different layouts?
2. Are you trying to clone from one to another?
Loner T - I want to thank you for your patient assistance. In regards to the above [minus a long story] I deleted the partition. Later on, I accessed Apple Internet Recovery, used Disk Utility to wipe the drive of Yosemite, and did a Factory install of Mavericks. I know if I upgrade to Yosemite FROM Mavericks I will be able to access OS X from Windows. My mistake was in performing a clean install of Yosemite [hoping to clear up the Apple Mail issues - my goodness, Yosemite causes glitches!]. Once I had a clean install of Mavericks I was hoping that the Apple BC Assistant would create an "older" Windows 7 user-friendly install download. I was REALLY thrown Apple's dumping of W7 support [in favour of W8 & W10]. But no such luck. Using your methods posted elsewhere I found my way through to a healthy W7 install. What Apple has failed to consider is that many boot camp users [such as myself] only own an upgrade license to Windows 8. Windows 7 is still a MUST. Even if only for the sake of upgrading to a free copy of Windows 10.
Yosemite was a lot of fun and it's very colourful, but I think I will stick to the stability of Mavericks for a while - and Windows 7. Let me know if there's anything you wanted to know. Cheers
Very 😀 to see you at least arrived at a 'safe' place, despite the bumps. Please make back ups of your OSes to be better prepared for future glitches. 😉
Hello Creative,
I have a Mac 27 retina with Yosemite preinstalled and now updated to El Capitan.
I made a bootcamp installing Windows 10, but I have the same problem: I'm not able to see Macintosh HD from Win10.
This is my diskutil cs list:
Last login: Wed Dec 23 21:09:59 on ttys000
iMac-di-MAURO:~ maurolazzerini$ diskutil cs list
CoreStorage logical volume groups (1 found)
|
+-- Logical Volume Group 6DBB0B24-62FC-4081-BC93-F65733288A33
=========================================================
Name: Internal Drive
Status: Online
Size: 772855619584 B (772.9 GB)
Free Space: 442368 B (442.4 KB)
|
+-< Physical Volume 21559397-143D-4CF3-B3A3-CA6FF9D800D6
| ----------------------------------------------------
| Index: 0
| Disk: disk0s2
| Status: Online
| Size: 120988852224 B (121.0 GB)
|
+-< Physical Volume 30B046F6-FFFA-49C9-A0EE-613D10B947CE
| ----------------------------------------------------
| Index: 1
| Disk: disk1s2
| Status: Online
| Size: 651866767360 B (651.9 GB)
|
+-> Logical Volume Family CB39499F-AC7A-472E-9A4C-D8DC517FCE48
----------------------------------------------------------
Encryption Type: None
|
+-> Logical Volume F9080A3B-8DB3-4D4A-A9C7-BFE2CD77F408
---------------------------------------------------
Disk: disk2
Status: Online
Size (Total): 766999920640 B (767.0 GB)
Revertible: No
LV Name: Macintosh HD
Volume Name: Macintosh HD
Content Hint: Apple_HFS
LVG Type: Fusion, Sparse
As you can see, it says revertible no
Can you give me advice please?
Thanks
A Fusion drive cannot be reverted. You will not be able to see OSX parts in Windows.
Hello Loner T, thank you.
So, neither Paragon hfs will help?
windows 8 does not recognise Macintosh HD, No drive Letter
