TurboTax is a software developed by Intuit to prepare income tax returns for Americans. The common causes why TurboTax won’t install on Mac can be – your Mac does not meet minimum system requirements. You cannot verify your administrator rights, file sharing is on, or the installation CD is damaged. Before you start the installation, check if your Mac meets the minimum system requirements. You also need to verify your administrator rights.
For more details: Learn How to Download and install TurboTax