Question :

In the past, I used to create my own custom Quartz-filters in ColorSync Utility, and they were instantly available system-wide in MacOSX. Now, in OSX 10.8 Mountain Lion and OSX 10.9 Mavericks, I don’t have access to my Quartz-filters anymore…

What is wrong ? And how can I fix this ?

Answer :

In the latest versions of OSX, there seems to be a bug preventing OSX to find Quartz-filters stored outside of the ‘official’ “Filters”-folder that is inside the “Library”-folder in the “System”-folder… so, since all custom-made Quartz-filters are stored inside the “Filters”-folder that is inside the (invisible) “Library”-folder in the User’s “Home”-folder, your custom-made Quartz-filters are not found by OSX…

The solution is to just move them into the right (official) “Filters”-folder. (Yep, it’s that easy…)

For an in-depth step-by-step guide for doing so, follow the procedure outlined here.