Jumping on this thread as I managed to find an answer that actually works for Mac OS. Link to reddit post below -
https://www.reddit.com/r/openrct2/comments/5s2cyd/gog_triple_thrill_pack_on_mac_osx_a_simple/?utm_source=amp&utm_medium=&utm_content=post_body
Does not require WINE or anything else other than the things mentioned in the post.
Enjoy!