USB 3.0 hard drive not showing up in Mac when I press ALT.w

By rodion15
Jun 17, 2016
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  1. I have a WD My Passport Ultra Portable Hard Drive, USB 3.0, Blue. It works fine in OS X but I find it strange that when I press Alt during startup it doesn't show its OS X volumes. I created 3 volumes with different OS X installs (10.9, 10.10, 10.11) for testing. It's formatted as Mac OS extended journaled. So I don't know why this is happening. Weird!
    I think this drive has some type of protection? not sure, may this be producing any issues. I haven't filevault enabled of course.
    Doesn't happen with all macs though, some macs show the bootable volumes good.
    Last edited: Jun 17, 2016

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