I have an old iMac running OSX 10.7.5/Safari 6.1.6.

Due to some programs on that system & generally slow systems on similar iMacs with more recent OSX version I do not want to update to a newer OSX

I have several websites forcing https which I can no longer access as safari says "Safari can not open the page …, as safari can not establish a secure connection to …" (translated from german).

Chrome and Firefox on the same machine are able to open these pages, as are more recent Safaris on more recent machines.

I tried downloading/installing the root certificate in the keychain, but this did not help.

Are there some security updates I'm not getting via normal system updates which could fix this?

For example: www.biblio.lu

  • Please add an example https site!
    – klanomath
    Commented Mar 14, 2017 at 15:25
  • here I found last Opera/Firefox/Chrome for Lion
    – kimstik
    Commented Nov 29, 2020 at 17:25

2 Answers 2


Safari 6/OS X doesn't support TLSv1.2. Sites only supporting the TLSv1.2 protocol like biblio.lu won't work in Safari 6.

You can cross-check/compare your browser's result at SSL Client Test with the SSL Server Test (e.g. SSL Server Test testing biblio.lu).

No supported protocols overlap between Safari 6.1.6/Mac OS X 10.7.5:

enter image description here

and biblio.lu

enter image description here

so no https access! Google Chrome 49.0.2623.112 (64-bit) - the last Google Chrome version supporting 10.6/10.7/10.8 works though.


what version of safari are you using?

As mentioned on this post by gentmatt, it can be a problem with safari's version.

Solution proposed by gentmatt was to delete this file:

  • OSX 10.7.5/Safari 6.1.6 None of the solutions proposed in that post helped
    – Pit
    Commented Mar 9, 2017 at 7:38
  • @Pit, i've found some information and a possible solution here Solution.
    – LvcasX1
    Commented Mar 9, 2017 at 12:33

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