It’s now been five months since I installed OS X 10.11 El Capitan on my iMac. Initially, after the upgrade, there were lots of issues including performance, Mail app issues, constant spinning circle/wait cursor, wifi issues, Finder/tab issues and also delays when starting up some apps. I then managed to fix some of these issues.

Now, after five months use, I’m still seeing some issues, but its performing far better than after the initial upgrade to OSX El Capitan.

Here’s some of the things I’ve done since my original post, which have improved things:

  • Upgraded to OSX 10.11.3 – the latest upgrade – which does seem to straighten out some of the issues
  • Safari was running annoyingly slow (e.g. 10-15 seconds) – both when starting it up and when trying to open a new tab – but following a tip on Apple Support Communities, I cleared out all the browser extensions and since then it has run perfectly (e.g. like before OSX El Capitan)
  • Used the HDCleaner app to remove all caches and logs, as I’d read in a few different places that these were liable to slow things down
  • I’ve also noticed that after a restart or fresh bootup of my iMac, things tend to be running a little slow, but then after everything I use day to day has been loaded in, it seems to run along well


I’m still seeing the following issues, but much less than previously:

  • Mail app hangs very occasionally and I have to restart it. Just after initial upgrade to OSX El Capitan it was doing this all the time and also constantly asking for passwords to be re-entered – that was really annoying
  • Finder, in multi-tab, sometimes goes wrong and has to be restarted, but again, much less than after initial upgrade