This is a new game for Mac OS so why are reviews locked ?

I have been playing Settlement:Collossus this game reminds me a lot of that one . I didn't think I would like it at first . I wasn't even going to finish the trial . No walkthrough , the hint system just said I needed more gold . How do I get more gold then ? Very frustrating . I don't know what made me continue to play I guess I couldn't stand not being able to figure it out ! As I played more things started going my way where I could progress . Now I can't seem to stop lol . There is a lot of ways to get money once you unlock the miller . I'm just now into the city gates I see the game has been out for PC since 2015 so I guess that's why the reviews are locked . Glad it came out for Mac ! So far no glitches or problems Happy Gaming everyone !