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Not sure if it's connected with rEFInd but my Mac can't install OS upgrades anymore. Please help

2018-08-26
2018-09-12
  • Dmitry Polpudenko

    I am running MacOS X Yosemite v10.10.5 and can't upgrade to HighSierra OS, the installer tells it cannot run on Macintosh HD or Recovery HD. Booting in recovery mode doesn't help either, the installer cannot find a partcular executable program. Apple help desk gave up and recomends to erase everything from the computer and install the OS anew. I wonder can this problem be connected with rEFInd running on my computer? If yes, what can I do to restore the ability to run OS upgrades?

    Cheers,
    D.

     
  • Roderick W. Smith

    Chances are this is not related to rEFInd. The usual cause of this type of problem is that the disk was re-partitioned in a way that the Apple installer doesn't like. In particular, if you check Apple's partitioning advice page, you'll see that they recommend a gap of 128MiB (they call it "128MB," but like many documents, theirs is sloppy on MB vs. MiB) between most partitions. If this rule is violated on certain partitions, the installer gets huffy and refuses to work. The solution is to shrink one or more partitions to create this gap.

     

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