Chicsterdude Said:
"How to delete multiple (text) messages on MacBook?: Thank you for your reply and insight. I have tried this approach several times, to no avail. Even Apple support can not address or resolve the issue. Frustrating to say the least. But again, thank you for your reply.”
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You are welcome.
So, what is your macOS? Go to: Apple menu > About this Mac…
Deleting and Selecting Multiple Massages:
A. Try Safe Mode:
While in Safe Mode, try using this browser. In Safe Mode, login items do not run, and corrupt system files(i.e. caches) are intentionally reset as a way to fix issues.
- Boot: in to Safe Mode: [Hold Down: shift key upon boot].
- Log in: as same user
- Try: this once more
- Restart the Mac Normally
- Try: this once more
B. Single-Out this User:
Try a pre Administrator user, seeing if you do not get this occur while in it. If so, then it is an issue with the configuration of the current user. If not, then it is an issue with the entire Mac, in which case you should reinstall the macOS. See below...
C. Reinstall the macOS:
Nothing would be deleted. It's just that items that have become corrupted or deleted, would be replaced or reinstalled back to where they should be. Go Here: How to reinstall macOS from macOS Recovery - Apple Support. Important: Be certain to create a backup of your Mac prior to performing the reinstall. That way, you can have something to restore from the Mac from, should anything go wrong with the reinstall. Once reinstalled, try this once more, seeing if you still get this error.