I use a Mac and I'm still very laggy. Apparently the update only worked for PCs. Some Jagex mod posts on the RS forums have claimed that they're working on an update for Macs. It will probably take them forever though.
I'm starting to get my lagg back.. everyday I notice my fps isnt around what it should be..
After update w64 edge max graphics was 50 fps.. now I'm getting 35 fps same spot I normally stand to skill in.. not sure if it's slowly going back down or what