Photoshop CS6 installation failure

Hi,

Getting this error when trying to install CS6 Masters Collection on a Mac. Everything installs besides Photoshop.

ERROR: DW050: The following Payload Errors were found during install:

                        - Adobe Photoshop CS6 Core: Failed due to Language Pack Installation Failure

                        - Adobe Photoshop CS6 Internationl English Pack_AdobePhotoshop13-en_GB: Install_Failed

What can I do to resolve this and get Photoshop installed on this machine