I trying to get Terraria 1.3 on my Mac today and ran into trouble. A few hours of it! haha So here is the easiest solution for now to get you going without hours of wasted time.
Here’s what I tried:
Play OnMac – This program works awesome and I use it to get most Windows program to work on my Mac. It’s even free! But it didn’t work for Terraria 1.3. I tried and tried and tried many different ways, but no luck. (PlayOnMac link: https://www.playonmac.com/en/)
Then I searched around and found a post on Reddit (https://www.reddit.com/r/Terraria/comments/3boqqs/mac_wrapper_for_terraria_13/) but it doesn’t work for the Steam version of Terraria, which I own.
So then I looked for more Windows on Mac type of programs and found Crossover. I installed the free 14 day trial which should work for long enough, because the makers of Terraria say that sometime in July 2015 they will release a stable Mac and Linux version of Terraria 1.3. Here’s a link to Crossover (https://www.codeweavers.com/products/), you have to enter a name and email address but then it downloads and works fine.
Watch My Youtube Vids and Join The NinjasAreReal Clan!
NinjasAreReal playing Terraria: https://www.youtube.com/watch?v=JDdttnl3Z-E&list=PLyY5nEsDjD72VebJQoa8rYVgpH_eH3urN
NinjasAreReal Funny Videos: https://www.youtube.com/watch?v=y49ELjackpI&list=PLyY5nEsDjD71fnnDDC4tzzKyFaKQdkkos (Some Terraria in There!)