Premiere Pro incessant crashing
Crashing in my version of Premiere Pro CC 2017.0.2 v 11.0.2 (47) has become intolerable. When manipulating clips in the main timeline of my project, I get beachballed and have to Force Quit. It happens with Ripple Edit, copy/paste, even moving clips vertically from one video channel to another. It happens roughly every 10 minutes.
I have an iMac Retina 5K, 27-inch, late 2014, 4GHz i7 processor, 32GB 1600 MHz DDR3 memory, AMD Radeon R9 4096MB graphics card. The prproj runs from an external mechanical 2TB HDD, and is about 80MB in size.
Among the fixes I've tried:
- uninstallation & reinstallation
- changing Renderer (OpenCL / Metal / Software only)
- Removing Unused
- breaking the 120MB prproj file into separate smaller prproj files
- disable Composite Preview During Trim
- copy and pasting
Here's a recent screenshot (without beachball)

I'm completely at the end of my tether and will be forced to find another editor unless this can be solved?
[Moderator note: moved to best forum]
