Fixing Mac OS X Install Errors “can’t be verified” and “error occurred while preparing the installation”
Two unusual error messages that can occur during the attempted installation of Mac OS X El Capitan or Mac OS X Yosemite are the “This copy of the Install OS X El Capitan application can’t be verified. It may have been corrupted or tampered with during downloading” error, or a “This copy of the Install … Read More

