Nancy Drew games on Mac require OS X 10.5.8 Leopard or higher to run.
The following OS X versions (and up) can run our games:
OS X 10.5.8 Leopard
OS X 10.6 Snow Leopard
OS X 10.7 Lion
OS X 10.8 Mountain Lion
OS X 10.9 Mavericks
OS X 10.10 Yosemite or higher
To find out what OS X you have, click the Apple menu > About This Mac. The OS X is given as a three-part number, e.g. 10.4.11. For help with this, check Apple Support.
If you are running OS X Tiger 10.4 or earlier, you will not be able to play our games on Mac. If you are unable to launch the game installer please check your OS X. If you do not have OS X 10.5.8 or later, you will need to purchase a Mac OS X upgrade to play our games. OS X upgrades are available at the Apple Store for $29 or less depending on your system needs.
For more help with your OS X, please check Apple Support.