Since some time when opening certain pages in Safari (Mojave on iMac late 2013), I get the error: ‘can’t open the page because Safari can’t establish a secure connection’. The error occurs on certain common websites (appleid.apple.com, gmail, reddit) but not on others (apple.com, google, macpowerusers). The problem is present in all user-accounts and only in Safari (Chrome works fine). I’ve tried a number of possible solutions, but with no result:
- Remove all website data;
- Uninstall suspicious extensions, plug-ins, and add-ons
- Clear Cookies
- Adjust DNS settings
- Disable IPv6
- Manually set certain certificates to Always Trust
- Reset Keychain (start with empty Keychain)
- Updated Safari & MacOS Mojave to the latest versions
Switching to another browser does not fully solve the problem, since certain apps apparently use the Safari-engine for their login dialogs (e.g. Google Backup&Sync, Spark Email), essentially rendering these apps useless, since I cannot login.
Does anyone have any clue what could be causing this error or how to solve it, other than installing Catalina (not possible give certain 32 bit apps in use) or reinstalling Mojave (I’d rather not). Thanks a lot!