Users have tried downloading the installer again but in most cases, it does not work out either. We will be discussing the causes in detail down below. There is another major reason why this error message can occur and that is the digital signature that comes with the installer. While that can be the case in some scenarios, it does not always hold true. This Copy of the Install OS X El Capitan Application Can’t be Verified Error Message The error message suggests that this copy of the installer may be corrupted due to which the issue is occurring. This error message occurs when your Mac device reboots in order to begin the installation phase. One of the errors that users face while upgrading to the OS X El Capitan is the “ This copy of the Install OS X El Capitan application can’t be verified“. However, when the installation does not go as planned, it can become tedious especially if you are aware of what the error message means. Installing a new version of the macOS operating system is always exciting and intriguing.

Download and install os x el capitan