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My question is pretty much summed up by the title, I have an external drive which I'd like to have recognized as an internal drive. How can I do that? Thanks for looking at my question. By the way I am running 10.11.3 on mbp

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I just found this answer, sorry I tried looking first but couldn't find it....

You should be able to do this with dd by setting Removable to False.

Unmount your disk, then run…

dd if=/dev/zero of=/dev/disk2 bs=1 count=1

Don't forget to replace disk2 with the actual disk identifier.

This command will erase the contents of the disk. Untested, be careful, usual 'not responsible if stuff goes wrong' applies :)

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  • Well first I guess I should say that the drive was empty, but what do you mean by an install, install what? – mac_33 Mar 19 '16 at 22:30
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    @Gene: Doesn't bs=1 mean 1 byte? And with count=1, wouldn't that mean to just write a value of zero to the first byte of the disk? – David Anderson Mar 19 '16 at 22:34
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    This answer is probably wrong. Byte 0 (the first byte of the first block is apparently always zero). Additionally this will probably not erase your disk! – klanomath Mar 19 '16 at 22:41
  • Not sure if this helps, but I tried it and even though I couldn't tell if the drive was erased since it was empty. Disk Utility does label it as an Internal Physical Volume... – mac_33 Mar 19 '16 at 23:14

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