MacOS 10.7.5 and 10.8 blocks the installation of the NTFS driver
When installing the Seagate NTFS driver in MacOS 10.7.5 or 10.8 (Mountain Lion), you may discover that MacOS is blocking the installation.
This is because MacOS 10.7.5 and 10.8 include a new feature called “Gatekeeper”.
Gatekeeper can be configured to block the installation of any software that does not have an 'Apple Certificate' written into it.
The version of the NTFS driver that was originally included with Seagate Backup Plus drives does not have that 'Apple Certificate'. Since the Backup Plus line of drives and its software was released in the first part of July 2012 and 10.8 was not released until later in that same month, the software that was included with the drive did not have that certificate written into it. Also, Apple recently released an update to 10.7.5 that included this Gatekeeper feature. The Apple certificate tells MacOS 10.7.5 and 10.8 it is compatible with that software.
Please follow this procedure to correct the problem:
Select System Preferences.
Under Personal, select Security & Privacy.
Under the General tab, you will see a heading that says Allow applications downloaded from.
Please select the Anywhere radio button.