Lag in Main Scene

I have a problem that's driving me crazy! My main scene is super laggy. It happens when I press play to start it, when I press play to stop it, or when I open the scene (File---Open Scene). Whenever I do one of these things, it lags for about a minute. I hate it! I can't figure out what's happening. I'm on a mac by the way. Please help!

 

First thing that comes to mind... how many objects do you have in the scene?

Its really hard to guess without your actual files. I promise, no one will try to steal your content. And posting it is proof of your content. So if you post it, it will help to solve the issue.

 

Use the Profiler to figure out what eating your performance (you can enable editor profiling too if you have Performance issues while not playing)

 

I tried the profiler. However, when it lags, the profiler freezes too. I'm not sure whats wrong, as I'm running a very fast Mac Pro Desktop Computer.

 

Whenever I do one of the things listed in my question, I get the spinny wheel of death and unity freezes for a while.

 

I think I figured out the problem. I have too many assets in my Assets folder. What should I do about that?