Help deleting partitions and install Lion

Discussion in 'macOS' started by cjs1489, Sep 16, 2011.

  1. cjs1489 macrumors newbie

    Sep 15, 2011
    Problem 1

    When I try to delete partitions in disk utility it tells me that it cannot unmount them, the same thing happens when I try to erase my entire hard drive. I used to have rEFIt on my computer with Linux using the other 2 partitions.

    I have wiped every hard drive clean in my attempt to remove the partitions but have had no luck, this also caused my second problem.

    Problem 2

    I have no operating system on my computer. I burned the dmg for lion onto a dvd but my mac doesn't want to boot off the dvd it only wants to run of "Restore HD" which redirects me to go buy lion, something I was trying to avoid doing.

    I burned the image onto the dvd, hoping that was the correct way to do it, maybe I'm wrong. I also burned a copy using disk utility, but neither copy works.

    Can someone please help me, I worked on this all yesterday and got nowhere, probably even when backwards.
    Thanks in advanced.
  2. cjs1489 thread starter macrumors newbie

    Sep 15, 2011
    If anyone else is having this problem I figured out how to fix it though, it is a little convoluted.

    I booted of Linux and erased all the partitions of it it from there. My problem was that I couldn't unmount my hard drive because I was using it. So after booting of the Ubuntu cd I was able to go in and erase the partitions from there and reformat a majority of the drive (not EFI or Recovery HD) to FAT. I then could run Restore HD and reformat the drive from there into Mac OS Extended.

    That solves problem 1

    As for problem 2 I'm still working on, I am going to start over with snow leopard, and will be writing that to a USB drive with the help of this guide
    And then I will update to Lion with my cd which I realized only has the upgrade on it not the full version.

    I'll let you know if anything goes wrong/ it worked in case anyone else has a similar problem to mine.

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