Twisted Treeline Fps lag

The twisted treeline is literally the only map that does not function on my mac, i want to know why because i run 35-60 fps in any other mode just in twisted treeline even on a Ai vs coop its excessively laggy and its only been since the upgrade traditional TT was where i used to thrive and enjoy being, now its upgrades have made it unplayable, btw please dont respond with "its your internet/computer/ connection or settings" i diagnosed it down to its simply the map causing visual lag its 30fps - 4fps please help, ive tried reinstalling, ive even tried messing with every setting on the options and its no help.