Question / Help Frame drops on Mac


New Member
I don't know much about what information I should provide to gain the most useful tips, but I'll add a few things I think might be helpful.
Processor: 3.1 GHz Intel Core i7
Memory: 16 GB 1600 MHz DDR3
2013 iMac
Ping: 19ms
Download Speed: 117.42 Mbps
Upload Speed: 30.78 Mbps

I am trying to stream to Twitch.Tv using OBS. I am not too sure on what settings I should be using, I have tried to search for settings but in most videos it seems they have a different version of OBS than me. I only have access to a few settings like: Common FPS, Base/Scaled Resolution, Video Bitrate, x264 preset, and a few other things that seem basic compared to the videos I've seen.
If you want to know what I'm streaming and getting frame drops on it is a video game called DOTA2.
If somebody could recommend what settings I should use on OBS, I would greatly appreciate it!