10.11.6 update has crippled my Mac Pro
Having trouble after update to 10.11.6 - System preferences panes won't open, can't seem to find any app that will open - reports of apps damaged, including disk utility, console, etc. Restart and shut down/restart don't clear it. Came looking for reports - problem seems not universal. Had successful update on my MacBook Pro, but my Mac Pro now seems in dire straits. Went the Recovery route and re-inatalled OS X . 10.11.6 was installed. Still no joy. Application folder shows only a bare few, and not the Apple applications. Cannot open any System Preferences panes. Safe Boot does not complete. Hardware OK - can boot successfully to a clone (CCC) of only a few days ago. Could do a restore (from Time Machine BU), but that is a last resort. Looking for others facing similar challenges and their success at resolving the issues.
Mac Pro, OS X El Capitan (10.11.6), 3.2 GHz Quad Xeon 16GB RAM, 12TB HD