Jarmaracark wrote:
As the day progresses, when I copy and paste, the copy does not replace the previous item in the clipboard, and I can only past the old item.
I have to open Activity Manager, find pboard and stop it.
This can happen several times a day. It's gone on for years. About once a year, I ask again and no one has an answer.
This sounds like third party interference...
To trouble shoot further you can:
—Test issue in another user (or guest user) account Change Users & Groups settings on Mac - Apple Support
This will tell you if it a universal issue or isolated to your user/admin account.
—A SafeBoot How to use safe mode on your Mac - Apple Support will sort many anomalies
Login and test. Reboot as normal and test. Caches get rebuilt automatically.
This test will tell you if third party interference; most* extensions etc are not loaded in safe boot mode.
*Ventura —System Settings>Privacy&Security>Extension look for interference w/ Finder Extensions. Safeboot no longer disabling some of these…ref: https://discussions.apple.com/thread/254632522
Uninstall all third party apps that are Cleaners/Optimizers/VPN/Anti-Virus
all known to cause issues on the macOS