In this post GS devs tell me that the spindump says it is photo resizing causing the ball of death. I can’t upgrade past 12.7.6 os because the Late 2015 iMac. I might try the 64 GB 9(grok says it works) but I hate to spend on it because the fusion drives wear out and can’t be replaced. I had a second identical computer that blew so I am on borrowed time with this one.