Why can’t I install the Album Designer on Mac 10.7?

This is due to the Mac’s security settings. You can resolve this as follows:

Step 1: Under Settings, go to Security & Privacy

Step 2: If necessary, click on General, and on the lock symbol to change your settings.

Step 3: You will now be asked to enter your administrator password. Once you have done this the options are enabled.

Step 4: Next, under Authorise Programmes that have been downloaded from the previous option, select Any Random Source.

Step 5: You can now close this screen and install the software.