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Apple Computing Products:
macOS - Operating System
Software Update problem?
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<blockquote data-quote="chscag" data-source="post: 1572691" data-attributes="member: 46727"><p>A screen shot would help, however, I suspect you're trying to erase the entire drive which also includes your Recovery partition. The system rightly tells you that it can't unmount the drive (because you're using it!).</p><p></p><p>Select the bottom part of the Toshiba drive which should be named "Macintosh HD" and select erase. See if that works and let us know.</p></blockquote><p></p>
[QUOTE="chscag, post: 1572691, member: 46727"] A screen shot would help, however, I suspect you're trying to erase the entire drive which also includes your Recovery partition. The system rightly tells you that it can't unmount the drive (because you're using it!). Select the bottom part of the Toshiba drive which should be named "Macintosh HD" and select erase. See if that works and let us know. [/QUOTE]
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Apple Computing Products:
macOS - Operating System
Software Update problem?
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