Open the blocked website (Facebook and Twitter are popular suspects) in another browser e.g. You experience the error in Safari but not in other browsers. Once an issue about encryption is fronted, the first place to seek an explanation is the certificates. Now let’s see if we can sort it out once and for all.

That is how the “Safari can’t establish a secure connection to the server” error comes about.

So once weak encryptions (or whatever the system presumes to be weak) are met, Safari will not be able to connect. This has especially been emphasized after efforts by OS X Yosemite (Version 10.10.4) and iOS 8.4 were boosted with extra security enhancements. But we all know for our privacy and security, websites have to be coupled with strong encryption before a web connection can be established unconditionally. When weak encryption is detected, Safari is instantly cut off from the connection (it is yet to be determined what detects the weak encryption first between Safari and the Mac system). Click the DNS tab and remove any entries in the left pane, then click the + symbol and add 8.8.8.8 and then click the plus symbol again to add 8.8.4.4. Then click the Network icon and choose Advanced. The possible causes for this bug have been narrowed down to several aspects.Ĭlick the Apple Icon and Choose System Preferences. This error gets you even if you do not use proxy to connect to the net. Clearing cookies, disabling extensions, resetting Safari, turning off Parental Controls, keychain analysis, and permissions reset all hit a brick wall. What is even more puzzling is that the usual related fixes do nothing for the error above. Some websites would open without a fuss on Safari while on others straight up you will get hit by the now famous “Safari can’t establish a secure connection to the server” error. Many Mac users have encountered this strange bug/hitch. It is weird how a browser would work seamlessly, then suddenly decide to choose where and when to function. There have been weird reports on how Safari just stops working (or decides to work selectively) after a given period.

Error message comcast insecure browser