Hi
actually your system is supported! (not fully as has not the nvidia gpu) but since 8.1 this are the imacs that works: (config guide resolve)
Building a Resolve iMac
Apple iMac:
21.5-inch, Mid 2011, 2.5GHz Intel Core i5
or
21.5-inch, Mid 2011, 2.7GHz Intel Core i5
or
21.5-inch, Mid 2011, 2.8GHz Intel Core i7
or
27-inch, Mid 2011, 2.7GHz Intel Core i5
or
27-inch, Mid 2011, 3.1GHz Intel Core i5
or
27-inch, Mid 2011, 3.4GHz Intel Core i7
Operating System: Mac OS X 10.6.7
RAM: 8 GB
hope that makes you happy 🙂
rodrigo