A few days ago Minecraft started playing with an average of 15 fps.
What could be wrong?
I have been playing 1.3.2 without lag before, but no more!
- tried optifine, very low settings, but the fps is about the same.
When I keep Minecraft open in a tiny window, instead of full screen, the fps will usually be 30-50 fps,
but then it's impossible to see anything.
Memory leak maybe?
Are you running anything more than minecraft at the moment of the Framedrop?
Also, could you please check your activity monitor?Also, have your updated your java to the latest version?
I once forgot to update my java on my macbook after a defragment, ran under 10fps because of old java.