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When trying to convert or resize a dmg image I get the error:

hdiutil: convert failed Resource Temporarily Unavailable error

or

hdiutil: resize: failed. Resource temporarily unavailable (35).

(hdiutil error code 35).

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Can somebody please add the tag 'hdiutil'? I dont have enough rep on AskDifferent? – reto Feb 15 at 10:50
thank you very much Global nomad! – reto Feb 15 at 10:57

1 Answer

The problem appears to happen when you unmount the image using umount.

Remount the image (either using hdiutil attach or just double click the image) and use the command hdiutil detach it again. This will unmount and eject the image.

hdiutil detach /Volumes/<your image>
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