How-To

Installing macOS or OS X: What to do when ‘the installer payload failed signature check’ or ‘this copy of the install OS X application cannot be verified’

If you encounter an error when trying to install a fresh operating system, it could be a problem with the date and time.

imac blank screen stock
Pixabay

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Roman has covered technology since the early 1990s. His career started at MacUser, and he's worked for MacAddict, Mac|Life, and TechTV.