OSX 10.15.6 USB Problems

brawlyturnip wrote:

SMC and NVRAM

 To trouble shoot further you can:

  —Try a SafeBoot https://support.apple.com/en-us/HT201262

  Takes noticeable longer to get to the login screen, does a 5-15 minute disk repair before it fully boots up, and certain system caches get cleared and rebuilt, including dynamic loader cache,  etc.  Login and test. Reboot and test as caches get rebuilt.

In Safe mode third party system modifications and system accelerations are disabled, it removes malware, etc hampering smooth operation, however a  reboot will put it back to normal mode.

This test will tell you if third party interference; extensions etc are not loaded in safe boot mode. 

 —Test issue in another user (or guest user) account  https://support.apple.com/en-us/HT204443

  This will tell you if it a universal issue or isolated to your user/admin account. 

brawlyturnip wrote:

Tried Safe mode and other accounts. No joy.

I would try reinstalling the macOS on top of your existing macOS and see if it brings the ports back to life.

How to reinstall macOS from macOS Recovery - https://support.apple.com/en-us/HT204904

if no resolve—

Call Customer Support  (800) MY–APPLE (800–692–7753) 

or on line  https://getsupport.apple.com/

or call  AppleCare Support at 1-800-APLCARE (800-275-2273)

brawlyturnip wrote:

Updated 2018 Mac Mini to Catalina 10.15.6 and now all USB C ports are now not working. Anyone else have this problem? Tried all usual resets. Any fixes/suggestions?

What are "Tried all usual resets" ?