The Wacom Bamboo CTE-660 is a legacy device (released around 2010-2012). Because it is discontinued, you cannot find drivers for it on Wacom’s main “Latest Drivers” page. Using a modern driver will likely cause your pen or touch features to stop working.
Latest Driver (recommended)
Real talk: If you are a modern Mac user, donate the CTE-660 to a Windows-using friend or a school computer lab. Wacom Bamboo Cte 660 Driver Download
C:\Windows\System32\DriverStore\FileRepository\wacom*.infgpedit.msc > Computer Config > Admin Templates > System > Device Installation > "Prevent installation of devices not described by other policy settings."