Since I upgraded to El Capitan, when I launch Safari, my fan runs hot, CPU goes into 100% usage and battery drops quickly. This does NOT happen with Firefox.
MacBook Air (13-inch, Early 2015), OS X El Capitan (10.11.1)
Force quit Safari then relaunch Safari while pressing and holding the shift key. This will launch Safari without any extensions or plugins. If Safari works better you will have to remove all extensions you've installed and reinstall them one at a time until you find the offending Safari extension.
Your profile says your are running 10.11.1. You may want to update to 10.11.6 if you haven't already.
No extensions. Safari was opening all my favorites into individual desktops, and not closing any of them when I quit Safari. Expose is now my new best friend, thanks to Adam at Rockingham Genius Bar!
I am running 10.11.6.
Hello Kimmie62,
Run Activity Monitor and see which specific task is hitting 100%. Each Safari tab will have its own process listed, with the web site URL as the process name. That makes it easy(er) to see which one is causing the problem. Unfortunately, sometimes entries in your "Top Sites" will be one that causes the problem.
Anytime I launch Safari my fan kicks in to high gear and gets hot. This does NOT happen with Firefox
