Hey Robert. Thank you for your reply. This is the EXACT process over the last few days. On Monday I built a simple ground landscape. I used basic nodes to color the landscape- I saved and re-opend through out the day, no issues. On Tues I created a simple bumble bee character (very simple circular meshes). I rigged the character with minimal bones. I opened and closed the project all day- no problems. On Wednesday I added a flower to the landscape, then used the particle system to populate the landscape with more of the flower. I opened and closed the project all day, no issues. Yesterday, I did some very simple animations of my Bumble Bee using an EMPTY as the driver. I opened and closed the proeject many times yesterday, no issues. I woke up today, tried to open the project, crash upon open.

Thank you Germano for the reply-

Just following up.... any thoughts on what is happening with my project??? Thank you Ankit!

Okay- thank you for the clarity....

Hello Ankit- Thank you again for trying to help me with this issue- My reply here is going to be VERY NAIVE! And I can't apologize enough.. As a newbie to Blender, Im afraid Im struggling with trying to get your requests.

• When you say "reduce elements from the file till the hang doesn't occur anymore.." What do you mean by the "hang???" And when you want me to reduce elements, you want me to actually start deleting things in my animation?? Like my models? My Rigs? things from my landscapes? And if so, do I just start erasing at will? or how do I know what to start erasing??

-Yes, I can render simple animations like default cube. (and I can do so without crashing).

• Where is the "activity monitor?" When Blender is rendering my animation the box that shows each frame after it renders only appears for a VERY quick split second. Is this what you wanted me to check? If so, I was able to take a screen shot when the frame came up in the brief brief second... I have uploaded with this report.

-How do I "upload a blender help menu > save system info.txt to check the GPU used by Blender????"

Here is the Blend File! Thank you!!!

Hello Ankit-
Thank you for your reply. I apologize for my incomplete, long report - I am new to this process and pretty new to Blender as well. I have attached my .blend file. Hopefully this is what you were requesting. Basically, I have been trying to render my animation in Eevee and Blender crashes every time 20-30 minutes into the process. I have Rendered it before with NO problems. The only thing that has changed is I did upgrade my Mac system from Mohave to Catalina and put a new hard drive in my Mac. But the Blend files were always on a external harddrive{F8836663}. Thank you again for ANY help! Im extremely frustrated trying to render my work... THANK YOU!!

Every time I try to Render my animation, the process starts, but about 20-30 minutes into Render process Blender crashes. Please help! THANK YOU!!!