Use Yosemite on the partition when it is working, but at present Note, this question is purely about partitioning, I do intend to I don't really understand what this is, and how to fix it.

I believe that a reason for this problem is that somehow the drive is now a logical volume group. I have tried changing the start up discs between the two, but still nothing changed in the menu. I tried entering Disk Utility from the Recovery Mode (by holding down option at start up), but the problem still persists. The Disk Utility looks similar to that seen in this question: Unable to adjust partition of USB drive with Mountain Lion Disk Utility though my computer is not encrypted, and it is the computer, not the USB I am having trouble with. The options are greyed out, and I cannot drag to resize either. Perhaps due to this, I believe, the tabs have changed when I select this disk, and I can no longer resize the partitions. I got the partition running fine, with the OS working fine as well, but now when I go back into Disk Utility, I noticed two things that are wrong:įirstly, the disk that houses the two partitions has taken the name that I had thought I had given the new partition ('Yosemite'), instead of what it originally said, somewhere along the lines of '125GB Hard Drive' or similar.

I have recently created a partition on my macbook air running OS X 10.9, and this was to run install another OS instance (Yes, OS X 10.10 Yosemite, but that is an aside to the query I have) on it.

Mac os disk utility cant see progress