All of a sudden all applications based on slow internet; High fan speed

All functions based on the web significantly slow down on Sunday, July 24

  • I mean by 'slow' 20 to 100 seconds just to connect (once connected, the load times are normal, even fast)
  • hit the apps: Safari, Firefox, iTunes, App Store, etc.
  • This happens on all wifi networks that I use (each with its own ISP, speeds ranging from 25mbps/10 Mbps up to 100 + Mbps / 100 + Mbit/s)
  • whenever I use the Web apps, the fan starts up and runs at full or almost full speed (if the apps are simply open, but not actively the connection/reconnection to what anyone, while the fans slow down.)

When you use the web-based applications, the following processes running around or above 100% of the CPU (in order of frequency):

  • Networking of Safari
  • acwebsecagent
  • nsurlsessiond
  • syncdefaultsd
  • cloudd

None of the following helped (I tested after each change):

The problem goes away when I...

  1. Run the Safari in a guest user
  2. Run the Safari of the recovery mode

Other info:

Mid-2013 Macbook Air

OS X 10.11.6

It is my third day of troubleshooting. I really need to get back to work (but it takes Web apps to work). I'm desperate.

Turn off and unplug all external devices

reset the SMC

https://support.Apple.com/en-us/HT201295

then start in safe mode

Try safe mode if your Mac does not end commissioning - Apple Support

then restart normally

If the problem persists, you can post an etrecheck here for further analysis by volunteers

www.etrecheck.com

Tags: Mac OS & System Software

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