I think some of the terms here are getting confused. It sounds like the original poster wants to play the Wowza's HLS URL (the playlist.m3u8 one) on a MacBook (or any laptop/desktop/non-iOS device).
If that's the case, the simple answer is you don't have to. In your Flash player, just use the Wowza RTMP Flash URL (without the "/playlist.m3u8" part on the end) and you will be streaming the original mp4 file. If you are using JW Player, you can use the same embed code to deliver both the RTMP and HLS version in one page and the client will select whichever one it can play:
Alternatively, if you use either the Premium or Ads versions of JW Player 6, you can embed with just the HLS version (the "playlist.m3u8" URL) and JW Player can either send it to iOS or convert it for Flash delivery.