My MacBook (El Capitan 10.11.2) one day cannot connect to the internet via wifi. It work solidly beforehand.

My router setting has not changed. Nor have any device white/black-listing. Other devices can connect to the router and internet fine.

  • ping works
  • nslookup stackexchange.com works
  • nslookup stackexchange.com fails
  • ping stackexchange.com times out

Interestingly if I connect to the Router's wifi guest, it works fine.


So a desktop that's connecting to the router via ethernet cable experience the same exact problem! Many other devices operated fine. This allow me to pinpoint the router is messed up somehow.

A power down restart on the router fixed everything.

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  • Nice! When in doubt...turn it off and back on again. – owlswipe Jul 28 '16 at 15:20

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