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All replies
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Helpful answers
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Dec 24, 2015 9:10 AM in response to techackby Loner T,Have you re-sized/re-partitioned your internal disk in any way after Windows and Mavericks were in place?
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Dec 24, 2015 9:24 AM in response to techackby Loner T,Can you post the output of the following Terminal commands for the record?
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.
Please backup OSX and Windows and create a Windows System Restore point, before you upgrade.
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Dec 24, 2015 9:30 AM in response to Loner Tby techack,sure, I will post the output.
My major concern is regd bootloader, some users have complained that they cant boot windows after installing os x..in that case system restore of windows also won't work
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Dec 24, 2015 9:35 AM in response to techackby Loner T,I have upgraded a 2012 13-in MBP from Mavericks to El Capitan Beta 3, without any issues. Most issues stem from users manipulating the partitions, which cause the NTFS header of the BC/Windows partition to be lost, or corrupted.
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Dec 24, 2015 7:07 PM in response to Loner Tby techack,/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *251.0 GB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_HFS Macintosh HD 70.0 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
4: Microsoft Basic Data Win8 180.1 GB disk0s4
No CoreStorage logical volume groups found
start size index contents 0 1 PMBR 1 1 Pri GPT header 2 32 Pri GPT table 34 6 40 409600 1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B 409640 136718752 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 137128392 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC 138397928 1816 138399744 351834112 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 490233856 863 490234719 32 Sec GPT table 490234751 1 Sec GPT header 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 - 490234751] <Unknown ID>
2: 00 0 0 0 - 0 0 0 [ 0 - 0] unused
3: 00 0 0 0 - 0 0 0 [ 0 - 0] unused
4: 00 0 0 0 - 0 0 0 [ 0 - 0] unused
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Dec 24, 2015 7:57 PM in response to techackby Loner T,This looks very strange.
techack wrote:
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *251.0 GB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_HFS Macintosh HD 70.0 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
4: Microsoft Basic Data Win8 180.1 GB disk0s4
No CoreStorage logical volume groups found
size index contents
0 1 PMBR
1 1 Pri GPT header
2 32 Pri GPT table
34 6
40 409600 1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B
409640 136718752 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC
137128392 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
138397928 1816
138399744 351834112 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
490233856 863
490234719 32 Sec GPT table
490234751 1 Sec GPT header
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 - 490234751] <Unknown ID>
2: 00 0 0 0 - 0 0 0 [ 0 - 0] unused
3: 00 0 0 0 - 0 0 0 [ 0 - 0] unused
4: 00 0 0 0 - 0 0 0 [ 0 - 0] unused
Is this before the upgrade or after?
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Dec 24, 2015 8:01 PM in response to Loner Tby techack,before the upgrade.
I will go ahead with the upgrade once I get a GO from you
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Dec 24, 2015 9:10 PM in response to techackby Loner T,Is the current installation of W8 (not W8.1) use EFI, or was it intentionally chosen to be EFI?
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Dec 24, 2015 9:32 PM in response to Loner Tby techack,Current installation is of W 8.1
I have already posted the output of all 4 commands which u requested. What do u find strange?
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Dec 24, 2015 9:59 PM in response to Loner Tby techack,BIOS Mode : UEFI
Do you need any other information as well?
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Dec 25, 2015 5:21 AM in response to techackby Loner T,As expected. Please upgrade after you have created baseline backups of OS X and Windows and a Windows System Restore point.
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Dec 28, 2015 11:10 PM in response to Loner Tby techack,Thanks for all your hlep Loner T.
I have successfully upgraded to EL Captian, keeping Win 8.1 in dual boot.
I plan to upgrade to Win 10 in near future. Can you pls help me out with required instructions so that I can dual boot El Captian & Win 10?