Opening File Failed... Too Many Open Files

I'm trying to access my project from my Macbook Pro like I always do but today it started giving me this weird error I've never seen before. It happens when I try to download updates on collaborate. The error states that Opening File Failed because there are too many files open. I can press Try Again, Cancel, or Force Quit. Try again and cancel don't do anything and eventually i receive a fatal error that causes Unity to crash. I have tried researching this but I cannot find a solution. Anyone know of a solution?

 

If you google for "mac os too many open files" you'll find a lot of discussion and steps regarding changing Mac OS's seemingly arbitrary overall and per process max open file limits. That's probably where I'd start. If you're hitting the max file limit for the entire system instead of the per process limit, you could try closing some programs, especially any web browser.

Sorry I don't use Mac OS, so don't have personal experience with it. I'm just aware this has been an annoyance with Macs for years now (not related to Unity). My understanding is Apple limits each process to around 10k to 12k open files, as well as about the same for the entire system by default. Windows has its own limit, but you never hear about it because it is over 16,000,000 per process. You're probably doing something wrong if you hit that on Windows

 

Posted a solution here!