Level 1

0 points

Unable to delete second partition

Hello,

I hope someone can help me.

I created a second partiton on my MacBook Pro Retina (512GB) and installed OSX Yosemite Beta 1 on it. So far so good.

I find this first beta version to be very buggy, so I wanted to delete this partition.

Now if I open Disk Utility, under 'partition' everything is greyed out, and somehow my ssd changed name to 'OSX Yosemite' (same name as my second partition).

Also it says down in the description that it is a 'Logical Volume Group', and that the capacity amounts to 40GB, but that's the space I gave to my second partition.

Attached you can find some screen grabs.

Has someone had the same problem?

Thanks

MacBook Pro with Retina display, OS X Mavericks (10.9.3)

Posted on Jun 8, 2014 7:40 AM

25 replies

Jul 25, 2014 12:30 PM in response to Blastonia

Agree the encryption is something to be aware of...however the steps above will still work all you have to do is click on Yosemite and click mount on top and enter your password before proceeding to erase the partition. It is advised to change it to a journaled non-encrypted partition when erasing. Thanks for pointing this extra step out Blastonia

Jul 25, 2014 9:37 PM in response to Shaftwell

Thank you for this! I'm very comfortable working on computers and this had me a little nervous - using the Disk Utility on the Recovery Partition worked a treat!

Aug 16, 2014 7:59 PM in response to davidforer

to delete yosemite partition all you need to do is make sure you rename your main partition as (Macintosh HD) and then go back to disk utility and delete the partition you want. it work for me!...

Oct 5, 2014 7:05 AM in response to RohanSood

APPLE GENIUS BAR HELPED ME

so basically mac detected OSX Yosemite BETA is much superior and newer than OSX Mavericks, so it made it the main partition. and you can't delete that main. so this is the fastest way to solve this prob

ON MAVERICKS:

open disk utility > (yosemite is default drive) press the yosemite beta partition > erase the data in the partition (partition still there) > after erasing it, mac detects OSX Mavericks is the main cuz yosemite is gone, and everything is back to normal (mavericks is main partitition) > so press the main partition (the most top one) and press partition > select the yosemite partition > press "-" > done

hoped this helped 😀

Oct 18, 2014 12:48 AM in response to davidforer

found an easy solution to this problem:

http://www.cultofmac.com/282347/install-yosemite-beta-without-ruining-main-machi ne/

(check comments)

Just erase the Yosemite content, then the '-' will become available and the partition can be deleted.

Ruhit

Level 1

10 points

Oct 18, 2014 6:51 AM in response to godsdisciple85

Thanks so much, worked perfect!

Oct 25, 2014 5:09 PM in response to Ruhit

I can't resize the partition or rather I can't apply it. It always says, that there was an error with the file-system and I can't do an internet recovery to mountain lion with cmd + r.

Does anyone know what to do, please?

Oct 26, 2014 8:01 AM in response to Palindrom007

Problem solved. I restored from a TimeMachine-Backup and then I could resize the partition. Weird!

cmoy1

Level 1

18 points

Dec 17, 2014 9:53 AM in response to Shankskun

Great, this worked for me too! Thanks for sharing your experience.

Sep 22, 2015 1:57 AM in response to davidforer

Maybe the problem is connected with Yosemite, since it uses Core Storage feature instead of standart apple disk partitions.. Here you can find an easy solution, which was helpful in my case: https://coriolis-systems.com/support/2015/3/using-ipartition-345-yosemite

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Unable to delete second partition