How To Fix The Invalid Certificate Error On Your Mac
The Invalid Certificate Error on Mac is an issue that troubles many users worldwide. It typically occurs when they open their Web browser and try to access some website, regardless of whether it is a popular one or not. Seeing the Invalid Certificate Error on Mac may prevent you from accessing websites that you are interested in, and it might be difficult to resolve it. While it might be possible to fix this by tampering with your browser and system settings, this might not always be the case – sometimes it is a server-side issue, which the website administrator must resolve.
The invalid certificate, which your browser warns you about means that your connection to an HTTPS website may not be secure because of an expired/invalid certificate. Here are some of the popular fixes you can use to try and resolve the problem:
Clear Browser Cache
Clearing the browser cache is one of the simplest things to try out. To do it, you will need to unlock Safari's developer console by following our tips on How to Reset Safari. In Google Chrome, Microsoft Edge and Mozilla Firefox, users need to use the button combination Control + Shift + Delete to accomplish this.
Verify Time and Date
Another common cause for the Invalid Certificate Error on Mac is an issue with your system's date & time. Using the wrong timezone, for example, may cause issues with certificates and prevent them from being validated. Go to Apple Menu -> System Preferences -> Date & Time, and then select the Set date and time automatically option.
Lower Trust Settings
If you are 100% certain that the website you are trying to access is legitimate, then you may try lowering the trust settings to bypass the error message. Go to Applications -> Utilities -> Keychain Access and open the Certificates tab. There, find the certificate triggering the error and manage its settings.
Delete the Problematic Certificate
Using the instructions above, access the Keychain Access menu again, but this time opt to delete the certificate causing the problem. It will be automatically downloaded the next time it is needed.
