Board Thread:ROBLOX help and discussion/@comment-33549702-20171102221449/@comment-26397550-20171102223810

Probably just the general ROBLOX issues with mac, but that's just a guess. Things are pretty unstable there, I hear

Otherwise might just be a loading issue of sorts- your client isn't loading the sounds. Usually these issues can be seen in the devconsole as the dev's scripts probably are spitting out errors when they can't load the sounds to your client- though I've no idea how to open it on Mac