I've had my MacBook Air for about six months. Now all the browsers are extremely sluggish — sometimes taking minutes to load a web page that would have used to take under one second to load back when everything was new.


  1. What's causing the sluggish browser response? (Most likely.)
  2. What is a stepwise procedure to troubleshoot and/or fix it?

Configuration Details

  • O/S: OS X Yosemite 10.10.5
  • Memory: 4 GB @ 1600MHz DDR
  • Browsers: Safari, Chrome
  • 1
    Usually memory, but some versions of Safari were slow for me; fixed in 9.0.1 [could also be DNS latency]. What OS & RAM, what browser/version? How many tabs open at once? – Tetsujin Nov 20 '15 at 6:18

Changing my DNS settings to Google's DNS servers and seems to help a little but might not be the comprehensive solution I was looking for.


Bottom toolbar > System Preferences > Network > Advanced... > DNS > + > > + >

Or, via command line:

networksetup -setdnsservers Wi-Fi

The procedure is detailed here.

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