upgrading to osx el captian

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upgrading to osx el captian

I have a Macbook Pro running osx Mavericks and Windows 8. I have downloaded the installer file for osx El Capitan and want to upgrade to it. However, seeing a few threads like:

https://discussions.apple.com/thread/7280772

How can I make my bootcamp partition bootable again after upgrading to El Capitan?

I'm skeptical whether Windows will work after the upgrade or will I need to re-install it. Can any expert who has tried this help me out with the proper method I might need to follow?

MacBook Pro with Retina display

Posted on Dec 24, 2015 9:01 AM

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Answer 1

Loner T

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Dec 24, 2015 9:10 AM in response to techack

Have you re-sized/re-partitioned your internal disk in any way after Windows and Mavericks were in place?

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Answer 2

techack Author

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Dec 24, 2015 9:16 AM in response to Loner T

no

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Answer 3

Loner T

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Dec 24, 2015 9:24 AM in response to techack

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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Answer 4

techack Author

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Dec 24, 2015 9:30 AM in response to Loner T

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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Answer 5

Loner T

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Dec 24, 2015 9:35 AM in response to techack

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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Answer 6

techack Author

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Dec 24, 2015 7:07 PM in response to Loner T

/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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Answer 7

Loner T

Level 9

59,536 points

Dec 24, 2015 7:57 PM in response to techack

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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Answer 8

techack Author

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Dec 24, 2015 8:01 PM in response to Loner T

before the upgrade.

I will go ahead with the upgrade once I get a GO from you 😉

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Answer 9

Loner T

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Dec 24, 2015 9:10 PM in response to techack

Is the current installation of W8 (not W8.1) use EFI, or was it intentionally chosen to be EFI?

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Answer 10

techack Author

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Dec 24, 2015 9:32 PM in response to Loner T

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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Answer 11

Loner T

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59,536 points

Dec 24, 2015 9:49 PM in response to techack

You do not have a valid MBR. This is usually the case when EFI Boot was used. If you boot into Windows, can you run msinfo32 and post information similar to the following?

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Answer 12

techack Author

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Dec 24, 2015 9:59 PM in response to Loner T

BIOS Mode : UEFI

Do you need any other information as well?

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Answer 13

Loner T

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Dec 25, 2015 5:21 AM in response to techack

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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Answer 14

techack Author

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Dec 28, 2015 11:10 PM in response to Loner T

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?

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Answer 15

Loner T

Level 9

59,536 points

Dec 29, 2015 9:16 AM in response to techack

1. You can execute an in-place upgrade from W8.1 to W10 - Use Windows 10 on your Mac with Boot Camp - Apple Support .

2. W8.1 should be fully activated and Windows Update should be run. Skip all Driver updates during Windows Update.

3. Create good backups of OSX and Windows.

4. You can download the ISO for W10 from https://www.microsoft.com/en-us/software-download/home .

5. After the upgrade and full activation of W10 your Mac is registered with Microsoft, in some instances, a clean installation of W10 may be required. There have been some cases of Windows Update pushing WHQL drivers to Macs which cause problems. It is recommended that you disconnect from the network while upgrading and create a Windows System Restore point before you allow Windows Update to make changes. In most cases, WHQL drivers should eb avoided.

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