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Apple Computing Products:
macOS - Apps and Programs
Can't reformat USB flash drive - disk won't unmount
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<blockquote data-quote="krs" data-source="post: 1816494" data-attributes="member: 67742"><p>Yes</p><p></p><p>Yes</p><p></p><p></p><p>On volume, ie indent "IWT"</p><p></p><p></p><p></p><p>All the times I reformatted any disk on any Mac, I would just click on "Erase" and pick the formatting I want.</p><p>Did the same thing here, the process starts trying to "unmount" the disk and then after a while I get the ""Can't unmount" error message</p><p></p><p>Tried the "unmount" this time first and then "erase", ie two steps - and that worked...thanks</p><p></p><p>Is that a change Apple made between SL and ElCap?</p><p>I have to try some other external drives on ElCap, but I never had to go through that two-step process before, selecting "Erase" would always automatically do the unmount process as part of the Erase and reformat process.</p><p></p><p>All is good - thanks again.</p></blockquote><p></p>
[QUOTE="krs, post: 1816494, member: 67742"] Yes Yes On volume, ie indent "IWT" All the times I reformatted any disk on any Mac, I would just click on "Erase" and pick the formatting I want. Did the same thing here, the process starts trying to "unmount" the disk and then after a while I get the ""Can't unmount" error message Tried the "unmount" this time first and then "erase", ie two steps - and that worked...thanks Is that a change Apple made between SL and ElCap? I have to try some other external drives on ElCap, but I never had to go through that two-step process before, selecting "Erase" would always automatically do the unmount process as part of the Erase and reformat process. All is good - thanks again. [/QUOTE]
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Apple Computing Products:
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Can't reformat USB flash drive - disk won't unmount
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