If i have minecraft for mac, do i have to buy it again on ps3?

Yeah sadly. I had to do the same. But its worth it. Go for it!

Yes, but don't get addicted, there's honestly better things to do, i recently quit the game.

Yeah bud

Yea, But you shouldn't download it PS3 is way behind in updates, it will feel like its missing a lot of stuff downgrading.

Don't buy it on the ps3. Listen i was thinking of getting it and i already have it on the PC. But when i found out the map size is less than 1000x1000x512 blocks (vs the PC's 20 billion x 20 billion x 512), and that the game was light years behind the PC version, i decided that i would not spend 20 dollars more for a limited version, and would just stick with the PC version.