Mac OS X lagggs

Hi, my system:
Mac OS X
Intel HD 4000
i5
SSD 250GB
RAM 4GB;
Question: All mac users have lags and how fix it?

I have a lot of lag too, player and animal movements are very jittery

What characteristics at your computer?

dude what are you complaining about lags

You have an HD4000 which is essentially a garbage video card. You need to stop playing on a macbook air and get yourself a hackintosh or macpro if you REAAAAAALLY want to play on OSX.

If you want to use that HD4000 and get better performance, use bootcamp and install windows 7

Sorry, but its the truth - playing on a hackintosh

Why i can play on other game normal and in Rust no?I want play on MacBook, not use bootcamp.
Other game perfect work on Mac

Processor 2.9 GHz Intel Core i7
Memory 8 GB 1600 MHz DDR3
Graphics Intel HD Graphics 4000 1024 MB
Software OS X 10.9 (13A603)

I don’t lagg when i turn off the grass, try doing that.

i try grass off, it help, but very little