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Old Jul 29, 2013, 10:40 PM   #1
dumb
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Help/How to safely remove Mavericks.

I have installed Mavericks on a separate partition along with ML and Windows via boot camp. After happily poking at a few iterations of the beta releases of Mavericks, I want to remove the Mavericks partition, which currently boots as the primary partition. How do I

1) Delete the Mavericks partition.
2) Revert ML as the main OS while boot up.
3) Merge the Mavericks Partition back to ML... don't want extra partition.
4) Ensure I end up with ML and boot camp, that I don't end up with a MBP that does not boot up.

P.S I will have things backed up just in case..

Thanks, hope others are in the same boat and can help me/others out.
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Old Jul 29, 2013, 10:43 PM   #2
Dalton63841
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Quote:
Originally Posted by dumb View Post
I have installed Mavericks on a separate partition along with ML and Windows via boot camp. After happily poking at a few iterations of the beta releases of Mavericks, I want to remove the Mavericks partition, which currently boots as the primary partition. How do I

1) Delete the Mavericks partition.
2) Revert ML as the main OS while boot up.
3) Merge the Mavericks Partition back to ML... don't want extra partition.
4) Ensure I end up with ML and boot camp, that I don't end up with a MBP that does not boot up.

P.S I will have things backed up just in case..

Thanks, hope others are in the same boat and can help me/others out.
Boot into ML, Open Disk Utility, delete Mavericks partition, expand Mountain Lion partition to take up the empty space. Done. Mountain Lion will automatically become the primary partition to boot from.
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Old Jul 29, 2013, 10:55 PM   #3
dumb
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^ Thanks. Deleted Mavericks, now ML boots as the default OS. However, I'm not able to merge back the unused space from Mavericks partition back to ML participation.

Also, what happened to the Mavericks Recovery partition, is that still lingering somewhere ?
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Old Jul 29, 2013, 11:00 PM   #4
Dalton63841
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Quote:
Originally Posted by dumb View Post
^ Thanks. Deleted Mavericks, now ML boots as the default OS. However, I'm not able to merge back the unused space from Mavericks partition back to ML participation.

Also, what happened to the Mavericks Recovery partition, is that still lingering somewhere ?
Open terminal and type:

Code:
diskutil list
Screenshot that window and post it here.
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Old Jul 29, 2013, 11:35 PM   #5
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Here is what's on diskutil.

/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *320.1 GB disk0
1: EFI 209.7 MB disk0s1
2: Apple_HFS Macintosh HD 216.3 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
4: Microsoft Basic Data Windows 80.7 GB disk0s4
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Old Jul 30, 2013, 12:03 PM   #6
HenryDJP
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Login to your developer account and follow the instructions to remove Mavericks listed in the developer forums.
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Old Aug 2, 2013, 09:45 PM   #7
mikecwest
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Quote:
Originally Posted by dumb View Post
^ Thanks. Deleted Mavericks, now ML boots as the default OS. However, I'm not able to merge back the unused space from Mavericks partition back to ML participation.

Also, what happened to the Mavericks Recovery partition, is that still lingering somewhere ?
You might need to boot from another disk, check for and repair disk errors. You might need to defrag your drive.

I had an issue with adjusting a partition size in the past, it was very frustrating.

It might take a while longer, but try to resize the ML partition to include 25% of the free space, instead of all of it. If it lets you do that, keep proceeding, adding more. I once had to do it in six increments. I could not explain to you why this works, or may work, but it did.
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Old Sep 2, 2013, 11:11 AM   #8
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Thanks for the inputs, I'm just following up with the fix.

Looks like you cannot resize (increase) the default OS X volume via diskutility tool or by Booting into Recovery Partition or by Cmd + R. The problem I see is that the recovery partition cannot be unmounted, even with diskutil unmount, hence hindering the resizing of the disk.

I had to boot from my Snow Leopard Disk then I was able to resize, as there was no lock or all the disks/volume were unmounted.

Caution: After resizing, it may cause your Bootcamp to become unbootable, I had to restore MBR to the windows partition.
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