This Copy Of The install Macos application is damaged and can't be used to install Macos Fixed Problem fixed

 

How to Fix “application is damaged, can’t be used to install macOS” Errors

If you have attempted to use a MacOS installer application recently, you may discover an error message stating something like “This copy of the Install macOS Mojave.app application is damaged, and can’t be used to install macOS.” This prevents the installer of macOS from working and running, and essentially makes the installer

 

From Yosemite and El Capitan: date 010101012015
From Sierra, High Sierra to Mojave, Catalina: date 010101012018

Press "Enter" the date command in the terminal and return to the OS X installer screen to continue the installation.

 

How to Fix “application is damaged, can’t be used to install macOS” Errors

If you have attempted to use a MacOS installer application recently, you may discover an error message stating something like “This copy of the Install macOS Mojave.app application is damaged, and can’t be used to install macOS.” This prevents the installer of macOS from working and running, and essentially makes the installer

 

From Yosemite and El Capitan: date 010101012015
From Sierra, High Sierra to Mojave, Catalina: date 010101012018

Press "Enter" the date command in the terminal and return to the OS X installer screen to continue the installation.