Comodo RSA Certificate untrusted by Safari but trusted by Firefox

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Level 1

17 points

Comodo RSA Certificate untrusted by Safari but trusted by Firefox

When accessing one of our bank accounts online both my wife and I have been getting a certificate error when entering the bank site's bill paying section. Other parts of the site do not trigger an error. Both us are running El Capitan 10.11.6 (15G22010) and Safari 11.1.2 (11605.3.8.1).

However we only get this error when using Safari! Firefox does not get the error. I checked and this certificate is not in my keychain. I contacted the bank online support and they were unhelpful.

I'm confused about why only Safari is giving this error and wondering if using the online bill paying really isn't safe.

MacBook Pro 13", OS X 10.11

Posted on Jul 9, 2019 5:04 AM

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Answer 1

Best reply

brenden dv

Community Specialist

Jul 10, 2019 9:04 AM in response to mudbucker

Hi mudbucker,

Thanks for coming to Apple Support Communities for help with Safari receiving the certificate error on your bank's website. More than likely, your bank's website is working fine since it seems to work in Firefox. You may just need an updated version of Safari.

You can check in the Mac App Store to see if there are any Safari updates for El Capitan. If not you can check to see if your Mac is upgradeable to a newer macOS. This would give you security updates and a newer version of Safari.

Check out these pages:

macOS High Sierra - Technical Specifications

macOS Mojave - Technical Specifications

Here are instructions to upgrade if your Mac is compatible with one of these versions of macOS:

How to upgrade to macOS High Sierra

Upgrade to macOS Mojave

Have a fantastic day!

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Answer 2

Eric Root

Level 10

684,045 points

Jul 10, 2019 9:23 AM in response to mudbucker

Check to make sure your applications are compatible.

Application Compatibility

Also check to make sure there is a compatible driver for your printer.

Do a backup before installing, preferable 2 backups on 2 different drives.

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Answer 3

mudbucker Author

Level 1

17 points

Jul 10, 2019 10:07 AM in response to brenden dv

Unfortunately, my MBP is too old and cannot go beyond El Capitan and I already have the latest Safari for El Capitan so I'm hosed...guess it's all Firefox for me from now on :(

My wife's MacBook Air can be updated to Mojave and a newer Safari to solve her problem.

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Comodo RSA Certificate untrusted by Safari but trusted by Firefox

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