Unless I'm understanding something wrong, in which case tell me:

Op 1: Choose something for first person: 12 ways

OP 2: Choose something for second person: 11 ways

...

Op 10: Choose something for tenth person: 3 ways

Op 11: Choose people for the 2 remaining fruits: 6^2 ways

Total: 12! * 6^2 / 2 = 18 * 12!

Other way:

Op 1: Assign a fruit for each person: 12P10

Op 2: Choose person for remaining fruit: 6^2