"The Sims 4 isn't responding" randomly when rotating or moving the camera.

What version of the Mac OS are you running on the Mac side? If you are running Maverick (10.9) or Yosemite (10.10) it seems ot clear up many of the issues Mac users are experiencing on the Mac side. Also the Script Mods are currently causing the Mac version to crash. EA is aware of the issue and working to fix it.

I have OS X Yosemite 10.10.2, but the problem with the game isn't on Mac, is on Bootcamp, on the Windows side. The game on Mac is unplayable, but in Windows runs niceley except for this strange issue when rotating/moving the camera.

Did you make sure your version of Windows is up to date? Updating only the graphics card drivers may have interfered with something in Windows. I know that's happened to me on the Mac side. Just trying to eliminate possible conflicts. 

Yes, Windows 8.1 is updated and graphic card drivers also (I make a clean driver reinstallation) But, as I said, it's a random issue, and the problem is that I don't know when it's gonna happen again, because I don't know the cause.

Trying to eliminate causes to find the solutions. 😕miley happy: When you play over the next few days, try to keep track of what you are doing (building, adding furniture, etc) when the problem occurs. See then if you can duplicate the circumstances so we can drill down to what might be causing it. Just as an FYI, they just updated Sims 4 for the Mac with a new patch.

Well, after almost 3 days with no issues, today I traveled to the pub and, when moving the camera... game freezes and "The Sims 4 isn't responding". I honestly can't understand what's going on, but this is getting ridiculous, I can't play forever thinking "When will the game freezes again?"

Are you on a laptop? You didn't say if you were or not. I'm guessing you are. The Mac version has recently been patched as of Friday and it seems to help many of the players be able to play it on the Mac side. Is there a reason why you aren't playing it under the Mac OS? Just wondering. 

So this time the camera froze when you traveled to another location with your Sims. Do you have any CC installed? I know you said you only had a couple of Mods installed. Have you tried playing without the CC or the Mods? They may be interfering with the camera controls at some level.

I'm playing on an iMac. I don't play under Mac OS due to the performance is simply awful, with lag and lower FPS compared to playing under Bootcamp.

I don't have any CC installed and I tried playing with no mods but, the issue is still happening, so it's not caused by the mods 😕mileysad:

Have you tried moving your Sims 4 folder to the desktop? (Documents > Electronic Arts > Sims 4) Don't worry, your saved games will be safe. Restart the game and allow the game to regenerate a new folder. Something may have become corrupt in one of the files.

Yep, I also tried with a "clean" The Sims 4 folder and it didn't work. I followed all the usual steps when trying to recognize a problem, but none worked for me so... :-/