Start Up Disk

App & System Services Core OS
Ed217 OP
Created Jun ’15
Replies 7
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Views 524
Participants 2

My system has 3 OS versions installed in three different drives and partitions. Prior to the upgrade t0 10.11 (of one of the three) all three booted correctly. Now after the upgrade, the other two partitions do not boot and instead it goes back to 10.11.


I have OS X 10.9.5 on the first disk and partition, 10.11 on the second, and 10.10.4 on the third. The system has 4 total drives, the 4th being used for TimeMachine. The 10.11 partition is on the internal drive. THe other two on removeable USB drives from WD.


Anyone else seeing this?

Replies  7
Boosts  0
Views  524
Participants  2
NRaurora OP
Jun ’15

Do you see the other volumes when you view the boot manager (holding option at start-up)? Do you see them in Disk Utility on 10.11?

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Ed217 OP
Jun ’15

Disk Utility shows all drives and each checks with no errors. The Start Up option of prefereneces shows the same 3 boot partitions as it did before.


Have not tried the option key part, but will.

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NRaurora OP
Jun ’15

Two questions:


1) Do you have FileVault enabled?

2) What do you get when you run in a Terminal window "diskutil CoreStorage list"?

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Ed217 OP
Jun ’15

Used Option key. It showed 3 choices, 10.11 partition, 10.11 recovery and OS X Installer. the normal Mavericks and Yosemite partitions did not show.

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Ed217 OP
Jun ’15

No to FIleVault as far as I know.


Command yields: No CoreStorage logical volume groups found

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NRaurora OP
Jun ’15

Can you try changing your Startup Disk in System Preferences? Make sure to give the pane a bit of time to read and recognize your volumes properly.


I expect that this will work as a temporary fix. In terms of reaching a more permanent solution, I'm interested in seeing what "diskutil list" shows. Would you mind pasting or describing (if you know how to) the output that command yields? Note that it does include volume names and identifiers, which you can remove. I'm interested in your disk tree and what type of partition your 10.11 installation is.

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Ed217 OP
Jun ’15

Tried the Start Up Disk options right from the start, hence the thread topic name. Neigher of two backup ones work. Each ends up in the same 10.11 system.


Running the disk command in terminal yielded: "No CoreStorage logical volume groups found".


Yosemite started out as a terrible release and so far 10.11 is similar.

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Start Up Disk
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