Up north at fams. Had this happen numerous times on my Macs when travelling but I usually can do part of my biz online/cloud from tablet (obviously prefer a laptop) however this week I had to do a bunch of stuff from my laptop and can't get online. All sites say that "this Webpage is not available blah blah blah". Ran diagnostics and airport/airport settings/network settings are fine, but isp/internet/server all say failed. This is on both the 13 and 15. Wife's cousin is in and she's the only other one with a Mac and same issue. All windows laptops are fine, android phones and tablets fine, iPhones and iPads are fine. I'm not going to reset and go through their network to figure it out, that's ridiculous and shouldn't have to. Went to coffee shop and same thing, worked fine at her cousins house though. But have had this happen numerous times when travelling and friends with Macs have said the same thing. Wife's uncle switched to a Windows laptop b/c he travels all over the world for work and got sick of network issues on his Mac. So what causes this?