data packs do not work in macOS. Need proof? Here it is:
if you take a working data pack from someone else using windows and port the data pack to Mac, your data pack will not work. I've tested this and used the /datapack list available.
MC-122768
data packs do not work in Mac OS/OSX
Resolved
Cannot Reproduce
0
I use a mac, and I can use data packs, Did you reload your world after putting the data pack in?