did the clean install. the beach balls haven't appeared and i managed to play large mp4 files with quick look from an ex. HD without any problems. there are some files missing from the most recent back up for some reason. i'm guessing the next step is redownloading each app one by one and finding out which one could have caused the issue?
You've mentioned a number of things here (clean install, no beach balls, quick look at mp4 files, files missing from backup, etc.).
I'm not sure how much testing you did after ONLY the clean OS install (I would have done at least a few hours)…or whatever amount of time that would greatly exceed when you would normally see beach balls…just to be sure.
I certainly would not have done any "quick looking" or anything related to a backup until I was 100% sure things were rock solid.
But yes like you mentioned. If you do think that things are stable (no beach balls)…then this would indicate that something (or a combination of things) from a software perspective was installed previously that was causing the beach balls. And if everything is restored from a previous backup…then these problems may simply be replicated if restored from a backup.
So the best method to avoid replicating the problem…is to do a fresh install of your apps. Restoring your files from a backup should be ok (music, project files you created, videos, photos, etc.).
In many cases…the problem applications probably were/are uncommon/unfamiliar 3rd party apps like:
- interface customizing apps
- utility apps
- torrent site stuff
- some anti malware, anti virus, "cleaning" apps
- basically stuff that could potentially be problematic or not work well with the Mac OS (sometimes this sort of stuff is just learned via trial & error)
* Nick