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I have two installation issues. 1) Trying to install UBUNTU in a macbook air mac osx, I can't seem to get past step 7: Run diskutil unmountDisk /dev/diskN (replace N with the disk number from the last command; in the previous example, N would be 2). Any suggestions?

2) I'm trying to install openFoam in a pc but can't seem to get it done either. In the pc it gives me an error of unable to find the file:

VERS=$(lsb_release -cs) sudo sh -c "echo deb $VERS main > /etc/apt/sources.list.d/openfoam.list"

sudo apt-get install openfoam211

Anybody know how to work around this issue? Thanks for any help on this matter.


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In step 7, if you cannot unmount the disk with the diskutil command, open up OS X's the graphical Disk Utility. You will see the unmount option there, which may work.

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