Cópia do OSX nao pode ser verificada ou está corrompida. Erro ao fazer uma instalação limpa do OSX

1. Click on Utilities –> Terminal
2. When the terminal window opens, type date and hit enter. What you will notice is that the date listed will be wrong. That wrong date is what is causing the reinstall error.
3. To correct the wrong date –> type date followed by MMDDHHMMYYYY (Month – Date – Hour – Minute – Year)
4. Exit and begin a new install, the problem should now be solved.