Resolve 17 Crashes on Mac

Hello
I am running DaVinci Resolve 17.1.1 on a iMac 5K, i9 processor, 40 GB RAM, Radeon Pro Graphics 8GB, running Big Sure 11.2.3.
App downloaded from App Store.

DaVinci keeps crashing, happened randomly, happened when I looked at titles a few times.
Once it crashes I can't reopen it. It loads to an error window and then is not usable after.
I have to delete it, download it and hope it works. any ideas?
error message attached

please help

You may need to repair your permissions with Apple's "First Aid" or a better tool like Disk Warrior.

Didn’t work. No errors found

If I unplug my external drive, I can start Davinci. Once restarted, I can reconnect database. The problem resumes at next start up.

Any other ideas?

[Peter Chamberlain]

We recommend you put the database on the system drive.

Peter,

What is the recommended way to move database to system drive? Just take a backup copy and place it on system drive?

I have an IMAC 27" with an I7 Processor, (remainder of specs below) and i too am having a series of crashes when trying to export a 60 minute video. Footage is 4K30P from Sony A7R II, and Osmo 2. My Activities monitor tells me my CPU is only running at 57-58% during the export and frequently the frame rate is down to 1 or .5 fps,though sometimes it will go up to 30fps. I slowed the render to 75% instead of "Maximum".

I've rarely had any crashes on export, until now and I've ben using DR 17 since the first beta was released.

Also I generally copy my database at the end of the day, just in case there's a problem.

Any suggestions would be most appreciated....Thx...Jim

IMac specs

IMac (Retina 5K, 27-inch, Late 2014)
OS 11.4
Davinci Resolve Studio 17.2.1 Build 12
Processor: 4 GHz Intel Core i7
Memory: 32 GB 1600 MHz DDR3
Startup Disk: Mac HD/3 TB Fusion
Graphics: AMD Radeon R9 M295X 4096 MB

Video Drives
6TB Raid “0” in OWC Thunderbolt Housing, W328, R337.7
G-Raid 6TB-1 Ultra Studio thunderbolt raid 0, W229, R 232
G-Raid 6TB-2 Ultra Studio thunderbolt raid 0, w 230, R229
G-Raid 8TB Thunderbolt Raid 0, W 225 R 358
2 TB San Disk Rugged SSD
1 additional HDMI Monitor
Ultrstudio Mini Monitor