on my iPhone 6 get message sometimes: Safari cannot open website URL cannot be shown"
on my iMac Safari does open the site.; What's up with Safari?
iMac, OS X El Capitan (10.11.5), airport extreme, iPadAir,iPhone6
The iPhone version of Safari is the Mobile version which is not as robust. You could try using the desktop version for a particular site by following the steps here:
http://www.imore.com/how-request-desktop-version-website-your-iphone-or-ipad
Basically:
Visit the site in Safari.
Tap and hold the Refresh button in the URL bar.
Tap Request Desktop Site at bottom.
what does cannot open URL can't be shown Mean
